Denial of Service
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
How It Works
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions. Attackers exploit asymmetry: minimal attacker effort produces disproportionate resource consumption on the target. Application-level attacks use specially crafted inputs that trigger expensive operations—a regex engine processing malicious patterns can backtrack exponentially, or XML parsers recursively expand entities until memory exhausts. Network-level attacks flood targets with connection requests or amplify traffic through reflection, but application vulnerabilities often provide the most efficient attack surface.
The attack typically begins with reconnaissance to identify resource-intensive operations or unprotected endpoints. For algorithmic complexity attacks, adversaries craft inputs hitting worst-case performance—hash collision inputs filling hash tables with collisions, deeply nested JSON triggering recursive parsing, or pathological regex patterns like (a+)+b against strings of repeated 'a' characters. Resource exhaustion attacks open thousands of connections, upload massive files to unbounded storage, or trigger memory leaks through repeated operations. Crash-based attacks target error handling gaps: null pointer dereferences, unhandled exceptions in parsers, or assertion failures that terminate processes.
Impact
- Service unavailability preventing legitimate users from accessing applications during attack duration
- Revenue loss from downtime in e-commerce, SaaS platforms, or transaction processing systems
- Cascading failures as resource exhaustion spreads to dependent services or database connections pool out
- SLA violations triggering financial penalties and damaging customer trust
- Security team distraction providing cover for data exfiltration or intrusion attempts running concurrently
Real-World Examples
CVE-2018-1000544 in Ruby's WEBrick server allowed ReDoS through malicious HTTP headers containing specially crafted patterns that caused the regex engine to backtrack exponentially, freezing request processing threads. A single attacker could saturate all available workers.
Cloudflare experienced a global outage in 2019 when a single WAF rule containing an unoptimized regex hit pathological cases on legitimate traffic spikes. The .*(?:.*=.*)* pattern exhibited catastrophic backtracking, consuming CPU cycles across their edge network until the rule was disabled.
CVE-2013-1664 demonstrated XML bomb vulnerabilities in Python's XML libraries. Attackers uploaded XML documents with nested entity definitions-each entity expanding to ten copies of the previous level. A 1KB upload could expand to gigabytes in memory during parsing, crashing applications instantly.
Mitigation
- Strict input validation enforcing size limits, complexity bounds, and nesting depth restrictions before processing
- Request rate limiting per IP address, API key, or user session with exponential backoff
- Timeout enforcement terminating operations exceeding reasonable execution windows (typically 1-5 seconds)
- Resource quotas limiting memory allocation, CPU time, and connection counts per request or tenant
- Regex complexity analysis using linear-time algorithms or sanitizing patterns to eliminate backtracking
- Circuit breakers automatically rejecting requests when error rates or latency thresholds indicate degradation
- Load balancing and autoscaling distributing traffic across instances with automatic capacity expansion
Recent CVEs (39908)
Write-through mode deadlock in the Linux kernel netfs subsystem allows a local low-privileged user to hang the kernel, causing a denial of service. The defect in netfs_advance_writethrough() fails to unconditionally unlock a supplied folio, and prematurely marks it for writeback before the folio is fully written, creating a lock-ordering conflict against concurrent mmapped reads and writes. Patches are available across multiple stable kernel branches; no public exploit code or active exploitation has been identified.
Reference leak in the Linux kernel netfs subsystem exposes systems with network filesystem mounts to a local denial-of-service condition. The `netfs_write_begin()` function fails to drop its held reference on the netfs request object when `netfs_wait_for_read()` returns an error, violating reference-counting invariants in the kernel's network filesystem abstraction layer. A low-privileged local user who can trigger repeated write errors on a netfs-backed mount (NFS, Ceph, AFS, or similar) can slowly exhaust kernel memory resources. No public exploit code exists and EPSS is 0.17% (6th percentile), consistent with a low-priority kernel maintenance fix.
Reference leaks and memory corruption in the Linux kernel netfs subsystem allow a local unprivileged user to crash the system via crafted write operations on network-backed filesystems. The flaw in netfs_perform_write() incorrectly transitions folio->private between NULL, the NETFS_FOLIO_COPY_TO_CACHE sentinel, netfs_group pointers, and netfs_folio structs, enabling multiple private-data attachments, folio reference leaks, and netfs_group struct leaks that can exhaust kernel resources or trigger a kernel panic. No public exploit exists and EPSS sits at 0.17% (6th percentile), indicating no observed exploitation activity.
Null pointer dereference in the Linux kernel's block bio-integrity subsystem (`bio_integrity_map_user()`) allows a local low-privileged attacker to crash the kernel, causing a denial of service. The flaw stems from `pin_user_pages_fast()` being permitted to return a partial page-pin result that is never validated before `bvec_from_pages()` dereferences the uninitialized zero-address entry. Patches are available across multiple stable kernel branches and Ubuntu has issued USN-8593-1; no active exploitation has been identified (EPSS 0.17%, no CISA KEV listing).
NULL pointer dereference in the Linux kernel's drm/msm/adreno driver allows local low-privilege users to crash systems equipped with older Qualcomm Adreno GPU generations (a2xx through a4xx). Querying UBWC (Universal Bandwidth Compression) parameters from userspace on these GPU families - which have no UBWC support and therefore no initialized UBWC config structure - triggers a NULL dereference in adreno_get_param(), resulting in a kernel panic. No public exploit has been identified at time of analysis; EPSS is 0.17% (6th percentile), consistent with the hardware-specific, local-only scope.
In the Linux kernel, the following vulnerability has been resolved: ACPI: button: Fix ACPI GPE handler leak during removal Commit a7e23ec17fee ("ACPI: button: Install notifier for system events as well") changed the ACPI notify handler type for ACPI buttons to ACPI_ALL_NOTIFY, but it forgot to update acpi_button_remove() to reflect that change. This leads to leaking the notify handler past driver removal, which may cause a kernel crash to occur if ACPI notify on the given device is triggered after removing the driver, and causes a subsequent probe of the given device with the same driver to fail. Address this by updating the acpi_remove_notify_handler() call in acpi_button_remove() as appropriate.
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: 6lowpan: check skb_clone() return value in send_mcast_pkt() The skb_clone() function can return NULL if memory allocation fails. send_mcast_pkt() calls skb_clone() without checking the return value, which can lead to a NULL pointer dereference in send_pkt() when it dereferences skb->data. Add a NULL check after skb_clone() and skip the peer if the clone fails.
In the Linux kernel, the following vulnerability has been resolved: bonding: refuse to enslave CAN devices syzbot reported a kernel paging request crash in can_rx_unregister() inside net/can/af_can.c. The crash occurs because a virtual CAN device (vxcan) is being enslaved to a bonding master. During the enslavement process, the bonding driver mutates and modifies the network device states to fit an Ethernet-like aggregation model. However, CAN devices operate on a completely different Layer 2 architecture, relying on the CAN mid-layer private data structure (can_ml_priv) instead of standard Ethernet structures. Since bonding does not initialize or maintain these CAN structures, subsequent operations on the half-enslaved interface (such as closing associated sockets via isotp_release) lead to a null-pointer dereference when accessing the CAN receiver lists. Bonding CAN interfaces is architecturally invalid as CAN lacks MAC addresses, ARP capabilities, and standard Ethernet link-layer mechanisms. While generic loopback devices are blocked globally in net/core/dev.c, virtual CAN devices bypass this check because they do not carry the IFF_LOOPBACK flag, despite acting as local software-loopbacks. Fix this by explicitly blocking network devices of type ARPHRD_CAN from being enslaved at the very beginning of bond_enslave(). This prevents illegal state mutations, eliminates the resulting KASAN crashes, and avoids potential memory leaks from incomplete socket cleanups. As the CAN support has been added a long time after bonding the Fixes-tag points to the introduction of ARPHRD_CAN that would have needed a specific handling in bonding_main.c.
In the Linux kernel, the following vulnerability has been resolved: ethtool: tsinfo: don't pass ERR_PTR to genlmsg_cancel on prepare failure The goto err label leads to: genlmsg_cancel(skb, ehdr); return ret; If ethnl_tsinfo_prepare_dump() failed, it has not started a genlmsg. There's nothing to cancel, and passing an error pointer to genlmsg_cancel() would cause a crash.
In the Linux kernel, the following vulnerability has been resolved: net: mana: Add NULL guards in teardown path to prevent panic on attach failure When queue allocation fails partway through, the error cleanup frees and NULLs apc->tx_qp and apc->rxqs. Multiple teardown paths such as mana_remove(), mana_change_mtu() recovery, and internal error handling in mana_alloc_queues() can subsequently call into functions that dereference these pointers without NULL checks: - mana_chn_setxdp() dereferences apc->rxqs[0], causing a NULL pointer dereference panic (CR2: 0000000000000000 at mana_chn_setxdp+0x26). - mana_destroy_vport() iterates apc->rxqs without a NULL check. - mana_fence_rqs() iterates apc->rxqs without a NULL check. - mana_dealloc_queues() iterates apc->tx_qp without a NULL check. Add NULL guards for apc->rxqs in mana_fence_rqs(), mana_destroy_vport(), and before the mana_chn_setxdp() call. Add a NULL guard for apc->tx_qp in mana_dealloc_queues() to skip TX queue draining when TX queues were never allocated or already freed.
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in rt6_fill_node() Sashiko reported this issue [1]. Apply the same fix as commit f8d8ce1b515a ("ipv6: fix possible infinite loop in fib6_info_uses_dev()"). Writers holding tb6_lock can list_del_rcu(&rt->fib6_siblings) without waiting for RCU readers; rt->fib6_siblings.next then still points into the old ring and this softirq-side walker never reaches &rt->fib6_siblings, causing a CPU stall. fib6_del_route() always WRITE_ONCE()s rt->fib6_nsiblings to 0 before list_del_rcu(), so an inside-loop check is a reliable detach signal. [1] https://sashiko.dev/#/patchset/20260526020227.4857-1-jiayuan.chen%40linux.dev
In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: ccg: reject firmware images without a ':' record header do_flash() locates the first .cyacd record with p = strnchr(fw->data, fw->size, ':'); while (p < eof) { s = strnchr(p + 1, eof - p - 1, ':'); ... } If the firmware image contains no ':' byte, strnchr() returns NULL. NULL compares less than the valid kernel pointer eof, so the loop body runs and strnchr() is called with p + 1 == (void *)1 and a length of roughly (unsigned long)eof, causing a wonderful crash. The not_signed_fw fallthrough earlier in do_flash() and the chip-state branches in ccg_fw_update_needed() allow an unsigned blob to reach this loop, so a root user who can place a crafted file under /lib/firmware and write the do_flash sysfs attribute can trigger the oops. Bail out with -EINVAL when the initial strnchr() returns NULL.
In the Linux kernel, the following vulnerability has been resolved: usbip: vudc: Fix use after free bug in vudc_remove due to race condition This patch follows up Zheng Wang's 2023 report of a use-after-free in vudc_remove(). The original thread stalled on Shuah Khan's request for runtime testing of the unplug/unbind path. This patch supplies that testing and keeps Zheng's original fix shape. In vudc_probe(), v_init_timer() binds udc->tr_timer.timer to v_timer(). usbip_sockfd_store() starts the timer via v_start_timer()/v_kick_timer(). vudc_remove() can then free the containing struct vudc while the timer is still pending or executing. KASAN confirms the race on an unpatched x86_64 QEMU guest with CONFIG_KASAN=y, CONFIG_USBIP_VUDC=y, CONFIG_USB_ZERO=y, and a tight loop that repeatedly writes a socket fd to usbip_sockfd, closes the socket pair, and unbinds/rebinds usbip-vudc.0: BUG: KASAN: slab-use-after-free in __run_timer_base.part.0+0x8ba/0x8e0 Write of size 8 at addr ffff888001b80740 by task trigger_and_unb/239 Allocated by task 239: vudc_probe+0x4d/0xaa0 Freed by task 239: kfree+0x18f/0x520 device_release_driver_internal+0x388/0x540 unbind_store+0xd9/0x100 This lands in the timer core rather than v_timer() itself because the embedded timer_list is being walked after its containing struct vudc has already been freed. The underlying lifetime bug is the same one Zheng reported. With v_stop_timer() called from vudc_remove() and the timer deleted synchronously, the same harness completed 5000 bind/unbind iterations with no KASAN report.
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix NULL pointer bug in svm_range_set_attr The process_info could be NULL if user doesn't call kfd_ioctl_acquire_vm before calling kfd_ioctl_svm. (cherry picked from commit 83a26c812e0529eb040d31a76f73e33e637243d4)
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix lock leak on ENOMEM in AMDGPU_GEM_OP_GET_MAPPING_INFO The AMDGPU_GEM_OP_GET_MAPPING_INFO branch of amdgpu_gem_op_ioctl() holds three cleanup-tracked resources before calling kvcalloc(): the drm_gem_object reference from drm_gem_object_lookup(), the drm_exec lock on the looked-up GEM via drm_exec_lock_obj(), and the drm_exec lock on the per-process VM root page directory via amdgpu_vm_lock_pd(). All three are released by the out_exec label that every other error path in this function jumps to. The kvcalloc() failure path returns -ENOMEM directly, skipping out_exec and leaking all three. The leaked per-process VM root PD dma_resv lock is the load-bearing leak: any subsequent operation on the same VM (further GEM ops, command-submission, eviction, TTM shrinker callbacks) blocks on the held lock. DRM_IOCTL_AMDGPU_GEM_OP is DRM_AUTH | DRM_RENDER_ALLOW, so this is an unprivileged-local denial of service against the caller's GPU context, reachable by any process with /dev/dri/renderD* access. Route the failure through out_exec so drm_exec_fini() and drm_gem_object_put() run. Reproduced on stock 7.0.0-10, Ryzen 7 5700U / Radeon Vega (Lucienne): the failing ioctl returns -ENOMEM and a second GET_MAPPING_INFO on the same fd then blocks in drm_exec_lock_obj() on the leaked dma_resv. SIGKILL on the caller does not reap the task; the fd-release path during process exit goes through amdgpu_gem_object_close() -> drm_exec_prepare_obj() on the same lock, leaving the task in D state until the box is rebooted. The patched kernel was not rebuilt and re-tested on this hardware; the fix is mechanical. Tested on a single Lucienne / Vega box only. Ziyi Guo posted an independent INT_MAX-bound check for args->num_entries in the same branch [1]; the two patches are complementary and can land in either order. (cherry picked from commit b69d3256d79de15f54c322986ff4da68f1d65b0a)
In the Linux kernel, the following vulnerability has been resolved: serial: dz: Convert to use a platform device Prevent a crash from happening as the first serial port is initialised: Console: switching to colour frame buffer device 160x64 tgafb: SFB+ detected, rev=0x02 fb0: Digital ZLX-E1 frame buffer device at 0x1e000000 DECstation DZ serial driver version 1.04 CPU 0 Unable to handle kernel paging request at virtual address 000000bc, epc == 8048b3a4, ra == 80470a78 Oops[#1]: CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.19.0-dirty #35 NONE $ 0 : 00000000 1000ac00 00000004 804707ac $ 4 : 00000000 80e20850 80e20858 81000030 $ 8 : 00000000 8072c81c 00000008 fefefeff $12 : 6c616972 00000006 80c5917f 69726420 $16 : 80e20800 00000000 808f8968 80e20800 $20 : 00000000 807f5a90 808b0094 808d3bc8 $24 : 00000018 80479030 $28 : 80c2e000 80c2fd70 00000069 80470a78 Hi : 00000004 Lo : 00000000 epc : 8048b3a4 __dev_fwnode+0x0/0xc ra : 80470a78 serial_base_ctrl_add+0xa0/0x168 Status: 1000ac04 IEp Cause : 30000008 (ExcCode 02) BadVA : 000000bc PrId : 00000220 (R3000) Modules linked in: Process swapper/0 (pid: 1, threadinfo=(ptrval), task=(ptrval), tls=00000000) Stack : 00400044 00400040 8046f4cc 00000000 808a6148 808a0000 808f8968 8086983c 808e0000 8046fc84 1000ac01 00000028 80e20700 802ba3f8 80e20700 80d34a94 80c1b900 80e20700 80e20700 80e20700 80e20700 80444650 00000000 00000000 00000000 807f5a90 808b0094 80447080 00400040 808e0000 80d34a94 808a6148 80d34a94 00000004 80e20700 00000000 8076974c 80469810 80c2fe3c 1000ac01 ... Call Trace: [<8048b3a4>] __dev_fwnode+0x0/0xc [<80470a78>] serial_base_ctrl_add+0xa0/0x168 [<8046fc84>] serial_core_register_port+0x1c8/0x974 [<808c6af0>] dz_init+0x74/0xc8 [<800470e0>] do_one_initcall+0x44/0x2d4 [<808b111c>] kernel_init_freeable+0x258/0x308 [<8072e434>] kernel_init+0x20/0x114 [<80049cd0>] ret_from_kernel_thread+0x14/0x1c Code: 27bd0018 03e00008 2402ffea <8c8200bc> 03e00008 00000000 27bdffc0 afbe0038 afb30024 ---[ end trace 0000000000000000 ]--- -- where a pointer is dereferenced that has been derived from a null pointer to the port's parent device. Since no device is available with legacy probing and it's not anymore a preferable way to discover devices anyway, switch the driver to using a platform device and use it as the port's parent device. Update resource handling accordingly and only request the actual span of addresses used within the slot, which will have had its resource already requested by generic platform device code. Use platform_driver_probe() not just because the DZ device is fixed with solder on board and not straightforward to remove, but foremost because the associated TTY's major device number is the same as used by the zs driver and the first driver to claim it will prevent the other one from using it. Either one DZ device or some SCC devices will be present in a given system but never both at a time, and therefore we want the major device number to be claimed by the first driver to actually successfully bind to its device and platform_driver_probe() is a way to fulfil that. An unfortunate consequence of the switch to a platform device is we now hand the console over from the bootconsole much later in the bootstrap. The firmware console handler appears good enough though to work so late and in particular with interrupts enabled. Conversely only starting the console port so late lets the reset code fully utilise our delay handlers, so switch from udelay() to fsleep() for transmitter draining so as to avoid busy-waiting for an excessive amount of time.
In the Linux kernel, the following vulnerability has been resolved: serial: zs: Convert to use a platform device Prevent a crash from happening as the first serial port is initialised: Console: switching to mono frame buffer device 160x64 fb0: PMAG-AA frame buffer device at tc0 DECstation Z85C30 serial driver version 0.10 CPU 0 Unable to handle kernel paging request at virtual address 0000002c, epc == 803ab00c, ra == 803aafe0 Oops[#1]: CPU: 0 PID: 1 Comm: swapper Not tainted 6.4.0-rc3-00031-g84a9582fd203-dirty #57 $ 0 : 00000000 10012c00 803aaeb0 00000000 $ 4 : 80e12f60 80e12f50 80e12f58 81000030 $ 8 : 00000000 805ff37c 00000000 33433538 $12 : 65732030 00000006 80c2915d 6c616972 $16 : 80e12f00 807b7630 00000000 00000000 $20 : 00000004 00000348 000001a0 807623b8 $24 : 00000018 00000000 $28 : 80c24000 80c25d60 8078b148 803aafe0 Hi : 00000000 Lo : 00000000 epc : 803ab00c serial_base_ctrl_add+0x78/0xf4 ra : 803aafe0 serial_base_ctrl_add+0x4c/0xf4 Status: 10012c03 KERNEL EXL IE Cause : 00000008 (ExcCode 02) BadVA : 0000002c PrId : 00000440 (R4400SC) Modules linked in: Process swapper (pid: 1, threadinfo=(ptrval), task=(ptrval), tls=00000000) Stack : 80760000 00000cc0 00400044 00400040 803aa02c 80d61ab8 00000000 807b7630 80760000 807623b8 807b7628 803aa644 80386998 00000000 80e17780 80220f68 80e17780 80d61ab8 80c17d80 80e17780 80e17780 8063c798 80e17780 80383fa0 00000010 80e17780 00000000 80386998 807a0000 00000000 00400040 8038f848 807623b8 80d61ab8 00000004 80e17780 00000000 803a68e4 80c25e2c 803bb884 ... Call Trace: [<803ab00c>] serial_base_ctrl_add+0x78/0xf4 [<803aa644>] serial_core_register_port+0x174/0x69c [<8077e9ac>] zs_init+0xc8/0xfc [<800404d4>] do_one_initcall+0x40/0x2ac [<8076cecc>] kernel_init_freeable+0x1e4/0x270 [<80605bec>] kernel_init+0x20/0x108 [<800431e8>] ret_from_kernel_thread+0x14/0x1c Code: 2442aeb0 ae120024 ae0200d0 <8c67002c> 50e00001 8c670000 3c06806e 3c05806e afb30010 ---[ end trace 0000000000000000 ]--- (report at the offending commit) -- where a pointer is dereferenced that has been derived from a null pointer to the port's parent device. Since no device is available with legacy probing and it's not anymore a preferable way to discover devices anyway, switch the driver to using a platform device and use it as the port's parent device. Update resource handling accordingly and only request the actual span of addresses used within the slot, which will have had its resource already requested by generic platform device code. Use platform_driver_probe() not just because SCC devices are fixed with solder on board and not straightforward to remove, but foremost because the associated TTY's major device number is the same as used by the dz driver and the first driver to claim it will prevent the other one from using it. Either one DZ device or some SCC devices will be present in a given system but never both at a time, and therefore we want the major device number to be claimed by the first driver to actually successfully bind to its device and platform_driver_probe() is a way to fulfil that. An unfortunate consequence of the switch to a platform device is we now hand the console over from the bootconsole much later in the bootstrap. The firmware console handler appears good enough though to work so late and in particular with interrupts enabled. Since there is one way only remaining to reach zs_reset() now, remove the port initialisation marker as no longer needed and go through the channel reset unconditionally.
In the Linux kernel, the following vulnerability has been resolved: block: Avoid mounting the bdev pseudo-filesystem in userspace The bdev pseudo-filesystem is an internal kernel filesystem with which userspace should not interfere. Unregister it so that userspace cannot even attempt to mount it. This fixes a bug [1] that occurs when attempting to access files, because the system call move_mount() uses pointers declared in the inode_operations structure, which for the bdev pseudo-filesystem are always equal to 0. `inode->i_op = &empty_iops;` [1] BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 23380067 P4D 23380067 PUD 23381067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN NOPTI CPU: 2 PID: 17125 Comm: syz-executor.0 Not tainted 6.1.155-syzkaller-00350-g84221fde2681 #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:0x0 Call Trace: <TASK> lookup_open.isra.0+0x700/0x1180 fs/namei.c:3460 open_last_lookups fs/namei.c:3550 [inline] path_openat+0x953/0x2700 fs/namei.c:3780 do_filp_open+0x1c5/0x410 fs/namei.c:3810 do_sys_openat2+0x171/0x4d0 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x13c/0x1f0 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Resource leak in the Linux kernel irqchip/imgpdc interrupt controller driver allows a local privileged user to induce a kernel use-after-free and system crash by triggering driver removal without proper cleanup. The imgpdc driver, targeting Imagination Technologies PDC hardware on MIPS-based SoCs, fails to free allocated domain generic interrupt chips or clear chained handlers on unbind, leaving dangling pointers on the global gc_list accessible by PM suspend, resume, and shutdown callbacks. No public exploit exists and EPSS is 0.18% (7th percentile), reflecting very low exploitation probability consistent with the niche hardware target.
NULL pointer dereference in the Linux kernel's fbdev framebuffer subsystem allows a local low-privileged user to trigger a kernel panic (denial of service) by replacing the framebuffer modelist via sysfs while fbcon is unbound. The crash occurs when a subsequent console takeover calls fb_videomode_to_var() with a NULL mode pointer, resulting from the broken invariant that info->var always has a matching entry in info->modelist. No public exploit or CISA KEV listing exists; EPSS of 0.18% (7th percentile) reflects negligible observed exploitation interest.
Null pointer dereference in the Linux kernel's virtual console screen (vc_screen) subsystem causes a local denial-of-service via kernel panic. The flaw exists in vcs_write(), where a race condition between concurrent writes and virtual console deallocation leaves a stale vc_data pointer that is subsequently dereferenced in the notifier chain. An authenticated local user with write access to /dev/vcs* devices can trigger this to crash the kernel. No public exploit exists and EPSS is very low at 0.19% (9th percentile), though the fix is confirmed available across multiple stable kernel branches.
NULL pointer dereference in the Linux kernel's vidtv virtual DVB test driver crashes the kernel when memory allocation fails silently during PID context initialization. Systems running kernel versions between the introducing commit (f90cf6079bf6) and the patched releases with CONFIG_DVB_VIDTV enabled are vulnerable to local denial of service. No public exploit is identified at time of analysis, and EPSS probability is 0.19% (9th percentile), indicating very low exploitation likelihood; the vulnerability is absent from CISA KEV.
Denial of service in SurrealDB before 2.0.5, 2.1.x before 2.1.5, and 2.2.x before 2.2.2 lets an authenticated user with OWNER or EDITOR rights define a custom function containing nested FOR loops that bypasses per-loop iteration limits and consumes all server CPU, ignoring configured query timeouts. The multiplicative iteration count (e.g. several nested loops of 1,000,000 each) monopolizes the process until it is manually killed, blocking all other queries and new connections. Discovered during a cure53 audit; no public exploit identified at time of analysis and it is not on CISA KEV, though the technique is trivially reproducible from the advisory.
Resource exhaustion in SurrealDB's embedded JavaScript scripting feature allows authenticated users to deny service by submitting long-running or infinite JavaScript functions that consume server CPU and thread resources without bound. Affected deployments must have explicitly enabled the scripting capability - it is off by default - making this a narrow but real risk in multi-tenant or shared SurrealDB environments where not all authenticated users are fully trusted. No public exploit identified at time of analysis; discovered during a professional code audit and penetration test conducted by cure53, rated Low severity by both cure53 and the vendor.
Denial of service in SurrealDB before 2.2.2 lets an authenticated user crash the database by calling the string::replace function with a regex pattern that produces an unbounded output string, exhausting server memory. The flaw spans the 2.0.x, 2.1.x, and 2.2.x release lines and was discovered during a cure53 security audit; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. Impact is availability-only with no confidentiality or integrity loss, rated CVSS 4.0 7.1 High.
Denial of service in SurrealDB before 2.2.2 allows any authenticated user to crash the database by submitting a crafted query whose result contains a null byte to the /sql HTTP endpoint. The null byte triggers an uncaught exception during JSON serialization of the query response in the net module, terminating the process and any application that depends on it. No public exploit has been identified at time of analysis, and the flaw is not listed in CISA KEV; the reported CVSS 4.0 base score is 7.1 (availability-only impact).
Denial of service in ExifReader 4.40.0 allows any remote, unauthenticated attacker to abort a Node.js request handler or worker by supplying a crafted ~24-byte HEIC or AVIF image buffer. The ISO-BMFF parser in `src/image-header-iso-bmff.js` lacks bounds checks before `DataView` reads, causing a native `RangeError` to escape internal catch blocks and propagate uncaught to the embedding application. No public exploit tool exists and the vulnerability is not listed in CISA KEV, but a fully working reproduction script is embedded in the GitHub Security Advisory GHSA-g77h-45rf-hcx4, and the fix was shipped in v4.40.1.
Denial of service in IBM Db2 11.5.x and 12.1.x allows a local database user to crash the database engine by submitting specially crafted SQL statements containing subqueries that trigger an infinite loop (CWE-835) in the query compiler. The vulnerability spans two active major release lines - 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4 - covering a broad swath of IBM's current Db2 product lifecycle. No public exploit code or active exploitation has been identified at time of analysis; IBM has released a patch via the vendor advisory.
Memory exhaustion denial-of-service in Zalando Skipper's Kubernetes admission webhook handler allows any authenticated in-cluster client to OOM-kill the skipper process by submitting an oversized HTTP request body. The Go handler at `dataclients/kubernetes/admission/admission.go:76` calls `io.ReadAll(r.Body)` with no preceding size guard, enabling unbounded heap allocation from attacker-controlled input (CWE-770). No public exploit has been identified at time of analysis; recovery is automatic via kubelet pod restart, but the disruption window blocks Ingress and RouteGroup admission operations for the cluster.
Keycloak's Client Policies enforcement mechanism - designed to mandate stronger OAuth/OIDC client authentication such as signed JWTs (RFC 7523) - can be bypassed by any attacker who already holds valid client credentials. By supplying a crafted, unsigned assertion header in the token request, the attacker causes Keycloak to evaluate policy compliance as satisfied without performing cryptographic verification, allowing authentication to proceed via a weaker method such as a plain client secret. No public exploit code has been identified and this vulnerability is not listed in CISA KEV; however, the integrity impact is meaningful for organizations that deployed Client Policies specifically to harden their authentication security posture, as those controls are silently neutralized.
Denial of service in Helm's Files.Lines template helper (pkg/engine/files.go) allows any party who can supply a crafted chart to crash Helm operations deterministically by embedding a zero-length file. Affected are all Helm releases through 4.2.3 across template, install, upgrade, lint, and SDK Engine.Render code paths. A public proof-of-concept exists via GitHub issue #32279; this CVE is not listed in CISA KEV, and a patch is available in upstream commit ba6c9a29.
GitHub Enterprise Server (all versions prior to 3.22) is vulnerable to authenticated denial of service via unbounded YAML parsing depth in release notes configuration files. An authenticated user with repository access can craft a release notes configuration file containing arbitrarily deeply nested YAML structures; when release note generation is triggered, the YAML parser processes the nesting without any depth limit, causing excessive CPU and memory consumption that can render the entire GHES instance unresponsive. No public exploit has been identified at time of analysis, and this was responsibly disclosed through the GitHub Bug Bounty program.
Improper null checking in Mattermost Desktop App versions ≤6.2, 5.5.13, and 6.0.2.0 enables any authenticated channel member to crash the Desktop App of all other members in the same channel by posting a crafted link containing an embedded image served without expected HTTP headers. The crash is client-side and can be made persistent if the malicious message remains in the channel, forcing repeated crashes each time an affected client reconnects. No public exploit has been identified at time of analysis, but the low-privilege attack vector and trivial reproduction make this a realistic insider or compromised-account threat in collaborative environments.
Mattermost Desktop App across the 5.x and 6.x release branches can be crashed by a malicious server operator through unvalidated inter-process payloads sent from the Mattermost Web App to the Desktop App. The root cause is the absence of payload validation in the Web-to-Desktop communication channel, enabling a server owner to send a malformed method payload that causes uncontrolled processing and application termination on the connected client. No public exploit code has been identified at time of analysis and the vulnerability is not listed in the CISA KEV catalog; however, the network-accessible path and low-complexity exploitation make this a credible denial-of-service threat for organizations running self-hosted Mattermost deployments with untrusted or compromised server administrators.
Privilege enforcement failure in Apache Accumulo 2.1.4 and 2.1.5 allows any authenticated low-privileged user - one without system-level permissions - to remotely trigger graceful shutdown of critical cluster services including the manager, tserver, gc, compactor, compaction-coordinator, monitor, and sserver. The result is a denial of service against the distributed data store, disrupting availability for all cluster consumers until an administrator manually restarts the affected components. No public exploit has been identified at time of analysis; a vendor-released fix is available in version 2.1.6.
Memory exhaustion denial-of-service in Wazuh's cluster protocol parser affects all deployments running versions 3.9.0 through 4.14.4. The cluster service reads an attacker-supplied payload length from an incoming message header and allocates memory of that size before performing any authentication or decryption, enabling unauthenticated adjacent-network attackers to exhaust system memory and crash the cluster service. No public exploit or CISA KEV listing exists at time of analysis; vendor-released patch 4.14.5 is available.
ReDoS in Grav CMS's Twig sandbox allows an authenticated page editor to crash the web server process via a catastrophically backtracking PCRE pattern supplied to the `regex_replace` filter. Affected versions are all Grav releases prior to 2.0.4. Exploitation requires a non-default configuration (`security.twig_content.process_enabled: true`) and at least page-editor-level authentication, limiting blast radius to deployments that have deliberately unlocked Twig processing in page content. No public exploit code or CISA KEV listing has been identified at time of analysis.
Denial of service in OpenClaw gateway via slow-read attacks against remote media URL processing affects all versions before 2026.6.1. Attackers with access to configured input paths can supply crafted remote media URLs that hold gateway worker connections open indefinitely, gradually exhausting the worker pool and degrading availability for legitimate requests. No active exploitation has been confirmed (not listed in CISA KEV) and no public POC has been identified at time of analysis, but the network-reachable vector and high availability impact make this a meaningful operational risk for exposed deployments.
YAML::Syck before version 1.47 crashes the Perl interpreter when parsing a YAML document that redefines an anchor name, due to a use-after-free and double-free in the bundled libsyck C library. Any caller invoking Load() or LoadFile() on attacker-controlled YAML - a common pattern in Perl web frameworks and data-pipeline tooling - is exposed to a denial-of-service condition that aborts the interpreter process. No public exploit beyond the CPANSec-confirmed 7-byte trigger document exists and no CISA KEV listing is present, but the trivially short trigger makes reliable reproduction straightforward.
Divide-by-zero in AutomationDirect Productivity Suite enables a local, low-privileged attacker to crash the application, resulting in a denial-of-service condition on engineering workstations used to program AutomationDirect PLCs. All versions are affected per CPE wildcard data, and the vulnerability was disclosed via CISA ICS advisory ICSA-26-197-04, indicating ICS-CERT involvement and an OT/industrial context. No public exploit or CISA KEV listing has been identified at time of analysis, and exploitation impact is limited strictly to availability - no data exfiltration or tampering is possible.
Panic-induced denial of service in nimiq-primitives (core-rs-albatross <= 1.5.1) allows a malicious state-sync peer to crash a syncing Nimiq blockchain node by sending a crafted TrieChunk whose proof contains two TrieProofNode entries with identical keys. The panic fires in TrieProof::verify() before any cryptographic proof validation occurs, so no valid proof is required to trigger it. The crash is transient - the node restarts and re-syncs - and no public exploit has been identified at time of analysis.
Nil pointer dereference in CoreDNS prior to 1.14.5 allows remote unauthenticated attackers to crash or degrade the DNS server by sending a single ordinary DNS query. The rewrite plugin's edns0 response rules dereference the result of IsEdns0() without a nil check; when a downstream plugin returns a response lacking an OPT record, the ResponseReverter panics, returning SERVFAIL in default deployments or terminating the CoreDNS process entirely when the debug directive is active. No public exploit code has been identified and the issue is fixed in v1.14.5.
Uncontrolled memory allocation in Envoy Gateway's OCI image fetcher allows a low-privileged tenant to crash-loop the shared controller cluster-wide. Versions before 1.7.4 and in the 1.8.x pre-release range before 1.8.1 are affected. By submitting an EnvoyExtensionPolicy referencing a malicious OCI registry serving a tar layer with a PAX/GNU-encoded multi-terabyte header size, an attacker triggers an unrecoverable Go runtime OOM in the controller - a single-request, non-volumetric, persistent denial of service that persists across restarts until the CRD is manually deleted. No public exploit identified at time of analysis.
Deterministic nil-pointer dereference in Envoy Gateway's gatewayapi runner allows a low-privileged tenant to permanently stall controller-wide xDS and Infrastructure IR publishing by submitting a single malformed CRD. Any tenant with namespace-scoped RBAC permission to create SecurityPolicy and TCPRoute resources can trigger a panic on every reconcile cycle by omitting the spec.authorization field, requiring administrator intervention to restore control-plane operations. No exploitation confirmed in the wild (not in CISA KEV); patches are available in versions 1.7.4 and 1.8.1.
Unbounded gzip decompression in Envoy Gateway's Wasm HTTP fetch path allows a low-privileged tenant to exhaust memory in the shared controller process via a crafted gzip-bomb URL, causing persistent cross-tenant control-plane outages. Any tenant with RBAC permission to create EnvoyExtensionPolicy resources can trigger approximately 10 GiB of heap allocation from a 10 MiB compressed payload, OOM-killing the controller; because the controller restarts and immediately re-reconciles the malicious custom resource, the crash-loop is self-sustaining and affects all co-tenants until the offending policy is deleted or the controller is patched. No public exploit code has been identified at time of analysis; vendor-released patches are available in versions 1.7.4 and 1.8.1.
Path traversal in Activepieces Enterprise Edition git-sync prior to 0.82.0 allows an authenticated project administrator to overwrite arbitrary files on the host filesystem, with potential impact ranging from data tampering and denial of service to remote code execution. Two distinct weaknesses compound each other: Git's symbolic-link handling was not disabled during repository cloning, and user-supplied identifiers - repository slug and the externalId fields for flows, tables, and connections - were concatenated into filesystem paths without sanitization of directory-traversal sequences. No public exploit code has been identified and this CVE is not listed in the CISA KEV catalog, but the patch commit makes exploitation paths derivable by any skilled attacker reviewing the open-source diff.
Uncontrolled heap amplification in Buffa's protobuf decoder allows an unauthenticated remote attacker to crash any network-facing Rust service that decodes untrusted protobuf input under the default code-generation settings, with no exploit code required beyond a well-formed serialized message. The amplification mechanism - roughly 22× for nested StartGroup unknown fields - means a 64 MiB payload can force approximately 1.4 GiB of heap allocation, exhausting process memory and terminating the service. No active exploitation is confirmed (not in CISA KEV), and no public proof-of-concept has been identified at time of analysis, but the attack is trivially constructible from the public advisory.
Session-squatting and memory exhaustion in Microsoft UFO's WebSocket server allow any authenticated client to permanently deny legitimate task owners access to their sessions or flood the shared session store with phantom entries. The COMMAND_RESULTS handler in ufo/server/ws/handler.py invoked get_or_create_session with a caller-supplied session_id but omitted the owner_client_id binding, and the message type carried no role gate - meaning any authenticated peer could pre-register arbitrary session IDs before their intended owners. This issue is not in CISA KEV and no public exploit has been identified, though the fix commit's regression tests provide a near-complete exploitation blueprint.
Denial of service in stoatchat (delta) versions before 20250210-1 (0.8.2) lets a remote unauthenticated attacker exhaust server resources by abusing the 'nearby' message query route. A logic error passes a message limit of zero to the database, which MongoDB interprets as 'no limit', so a single crafted request downloads an entire channel's history; parallelized requests amplify this into resource-exhaustion DoS. No public exploit identified at time of analysis and the flaw is not in CISA KEV, but the upstream fix and a VulnCheck advisory are published.
Path traversal in FunnelKit WordPress plugin before 3.15.0.6 enables authenticated administrators to delete arbitrary .json files outside the plugin's intended directory during template-import operations. The root cause is CWE-73 (External Control of File Name or Path): the deletion handler accepts user-supplied paths without canonicalization or boundary enforcement. Leveraging CVSS scope change (S:C), a malicious admin can target configuration files belonging to other installed plugins, causing cascading denial-of-service across the WordPress installation. A publicly available exploit exists; the vulnerability is not in the CISA KEV catalog at time of analysis.
Resource limit bypass in the websocket-driver npm library (versions < 0.7.5) allows WebSocket messages to exceed the application's configured maximum message size when the permessage-deflate compression extension is active. The size enforcement is applied to compressed frame length headers rather than the decompressed payload, meaning a highly compressed message can appear within limits on the wire but expand arbitrarily upon decompression. Vendor-released patch is available in version 0.7.5; no public exploit has been identified at time of analysis.
Memory exhaustion in the websocket-driver Ruby gem (versions prior to 0.8.1) allows a remote peer to crash or degrade a receiving process by sending an HTTP request or response with an arbitrarily large number of headers, which the parser accumulates without any size bound. Affected deployments are those using WebSocket::Driver.server() directly atop a raw TCP server (bypassing an HTTP framework), or applications using this library as a WebSocket client - standard HTTP framework integrations (Rails, Sinatra, Rack) are not in scope. No public exploit has been identified and the vulnerability is not listed in CISA KEV, but exploitation is mechanically trivial once a vulnerable deployment is identified, requiring only a crafted HTTP connection.
Resource exhaustion in the websocket-driver Ruby gem (faye/websocket-driver-ruby) allows any WebSocket peer to bypass a configured maximum message size when the permessage-deflate compression extension is in use. The size limit is enforced against the compressed frame length rather than the post-decompression size, enabling a decompression-bomb style attack where a small compressed payload expands far beyond the intended ceiling. Applications on versions below 0.8.1 silently accept oversized payloads, potentially exhausting server memory or CPU and causing a denial-of-service condition. No public exploit exists at time of analysis, but the attack class is well understood and low-complexity to implement.
Memory exhaustion in the Ruby websocket-driver gem (faye/websocket-driver-ruby) allows any network peer to crash the host process by abusing the draft WebSocket protocol's variable-length integer encoding. By streaming an indefinite sequence of bytes with values 0x80 or above in a frame length header, an attacker forces the parser to accumulate an ever-growing Ruby arbitrary-precision integer, consuming unbounded heap memory until the process is killed by the OS. The attack is bidirectional - a malicious server can target a client, or a malicious client can target a server - and no public exploit has been identified at time of analysis.
Resource exhaustion in Absolute Security Secure Access publisher (versions prior to 14.55) enables authenticated remote attackers holding valid tunnel credentials to trigger a non-persistent denial of service against the publisher component. The CVSS 4.0 score of 5.1 (Medium) reflects the constrained impact: availability loss is limited and self-recovering, with no confidentiality or integrity exposure. No public exploit code and no CISA KEV listing identified at time of analysis.
Memory management flaw in Absolute Secure Access prior to version 14.55 allows a remote attacker with deep protocol knowledge and tunnel control to trigger a non-persistent denial-of-service against the server component. Both client and server software are identified as affected per the vendor's own disclosure. No public exploit code and no CISA KEV listing are confirmed at time of analysis, and the non-persistent DoS nature implies the server likely auto-recovers, constraining operational impact.
Heap overflow in Absolute Security Secure Access client certificate parsing causes a local denial of service. Versions prior to 14.55 are affected. An attacker who already holds local administrator privileges on a managed endpoint can trigger the overflow to crash the Secure Access client, effectively disabling it on that machine. No public exploit code has been identified, and this vulnerability is not listed in the CISA KEV catalog.
Unvalidated chown in Samba's pam_winbind module allows a local user with narrow sudo delegation to transfer ownership of the root filesystem directory to a system account, causing system-wide denial of service on Red Hat Enterprise Linux 6 through 10. When mkhomedir is enabled and a system account has its home directory set to '/', any PAM-triggered authentication event run as that account via sudo invokes the chown without path sanitization. The resulting ownership change breaks SSH, sudo, and package-manager functionality, though the 0555 permissions on RHEL prevent write access escalation, confining the impact to high-severity availability loss. No public exploit or CISA KEV listing is identified at time of analysis.
Memory leak in ImageMagick's ICON decoder exposes services that process user-supplied images to a potential denial of service. Both the 7.x and 6.x release branches are affected - specifically versions before 7.1.2-26 and 6.9.13-51 respectively. An unauthenticated remote attacker (per CVSS PR:N) who can supply a crafted ICON file to an ImageMagick-processing endpoint can repeatedly trigger allocation failures that are never cleaned up, gradually exhausting process memory. No public exploit or active exploitation has been identified at time of analysis.
Memory leak in ImageMagick's MIFF encoder (CWE-401) affects the 7.x branch before 7.1.2-26 and the 6.x branch before 6.9.13-51, enabling denial of service through resource exhaustion. When a memory allocation fails during MIFF image encoding, previously allocated buffers are not released, causing memory to accumulate across repeated processing calls. The CVSS 4.0 score of 2.1 and a local attack vector (AV:L) with high complexity (AC:H) and specific prerequisites (AT:P) signal a low-priority finding with no public exploit and no CISA KEV listing.
Memory leak in ImageMagick's YUV decoder (versions before 7.1.2-26 and 6.9.x before 6.9.13-51) enables remote denial of service by repeatedly submitting malformed YUV images that trigger a failed blob open, leaking heap memory on each decode attempt. No confidentiality or integrity impact applies; exposure is limited to availability of image-processing services that accept untrusted input. No public exploit code or active exploitation has been identified at time of analysis.
Memory leak in ImageMagick's TIFF encoder before version 7.1.2-26 enables denial of service via controlled memory allocation failures. An attacker who can submit TIFF images for processing can repeatedly trigger allocation failures, causing the encoder to leak memory without releasing it, ultimately exhausting available system memory. No public exploit has been identified at time of analysis, and the CVSS 4.0 score of 2.1 reflects the constrained local attack vector and low availability impact.
Memory leak in ImageMagick's JNG encoder before version 7.1.2-26 enables local resource exhaustion when malformed JNG files cause blob open failures without subsequent memory release. The flaw is classified CWE-401 and carries a CVSS 4.0 score of just 2.1, reflecting a local attack vector, high complexity, and availability-only impact - no confidentiality or integrity loss is possible. No public exploit code and no active exploitation (CISA KEV) have been identified, making this a low-priority finding relevant primarily to services that batch-process untrusted image files.
Use-after-free in ImageMagick's FreeType integration path allows remote denial of service against image processing pipelines using vulnerable 6.x or 7.x releases. When FreeType initialization fails during an image processing operation, the affected code path neglects to exit cleanly and continues referencing already-freed memory, causing process corruption or crash. No public exploit identified at time of analysis; the CVSS 4.0 score of 6.3 with AC:H and AT:P reflects meaningful preconditions required to trigger the failure path.
Heap-based buffer over-write in ImageMagick's X11 import functionality exposes local systems to heap memory corruption and denial of service when processing a crafted X11 window title. Affected versions span both the 7.x branch (before 7.1.2-26) and the legacy 6.x branch (before 6.9.13-51), covering a large installed base across Linux and Unix environments. No public exploit identified at time of analysis, and the narrow exploitation conditions - requiring local privileged access with X11 in scope - significantly constrain real-world risk despite the CWE-122 heap overflow class.
Memory exhaustion denial of service in ImageMagick through 7.1.2-18 arises from the ASHLAR coder failing to release a temporary image object when an internal action fails, allowing an attacker who can supply malicious ASHLAR files to a processing pipeline to cumulatively exhaust process memory. The CVSS 4.0 vector (AV:L/UI:P) confirms this is a local-vector attack requiring passive user or pipeline interaction to process the crafted file, not a remote unauthenticated scenario. No public exploit has been identified at time of analysis, and the vulnerability is not listed in CISA KEV; confirmed fixed versions exist for Magick.NET NuGet packages at 14.11.1.
Denial of service in BusyBox 1.38.0 stems from a heap-based buffer overflow in the evalcommand() routine of the ash shell interpreter (shell/ash.c), where crafted input corrupts heap memory and crashes the process. No public exploit identified at time of analysis, and the EPSS probability is low (0.16%, 6th percentile), indicating no observed exploitation activity. Impact is limited to availability - no confidentiality or integrity loss is claimed per the CVSS vector.
Denial of service in BusyBox 1.38.0 lets attackers crash the bundled ash shell by supplying crafted input that triggers a heap-based buffer overflow (CWE-122) in the ifsbreakup() field-splitting routine of shell/ash.c. Only availability is impacted - there is no public exploit identified at time of analysis, and the EPSS score is low (0.16%, 6th percentile), indicating little observed exploitation interest so far. The NVD-assigned CVSS of 7.5 rests on a network attack vector that is not clearly supported by the description, which points to input being fed to a local shell.
Denial of service in BusyBox's AWK interpreter (editors/awk.c, commit 371fe9) lets an attacker crash the awk process by feeding it a crafted AWK script that overflows the stack inside the recursive evaluate() function. The impact is limited to availability (process crash) with no data exposure or code execution claimed; no public exploit identified at time of analysis and EPSS is very low (0.16%, 6th percentile). BusyBox is extremely widespread in embedded Linux, IoT firmware, and container base images, but exploitation requires the attacker to supply the script that awk executes, which materially narrows real-world reach.
Denial of service in BusyBox 1.38.0 arises from a use-after-free in the awk_sub() routine of the AWK applet (editors/awk.c), allowing an attacker who can supply a crafted AWK script to crash the busybox awk process. The flaw is a memory-corruption bug (CWE-416) with availability-only impact and no confidentiality or integrity consequences. There is no public exploit identified at time of analysis, it is not listed in CISA KEV, and its EPSS score is low (0.14%, 4th percentile).
Incorrect access control in CAXPerts UniversalPlantViewer WebServices Server v2.7.6 allows any authenticated low-privilege user to invoke the /api/License/deactivateOffline endpoint and strip the server's license, rendering the service inoperable. The flaw (CWE-284) grants low-privileged accounts an action that should be restricted to administrative roles, providing a trivial denial-of-service primitive against industrial plant visualization infrastructure. No public exploit identified at time of analysis, though a researcher disclosure post on Medium appears to document the discovery.
Denial of service in the Matter SDK (connectedhomeip) before 1.4.0 lets a network attacker crash the device by sending an InvokeCommandRequest to a nonexistent endpoint/cluster (e.g. 0x34), which the interaction model treats as valid and then aborts on a VerifyOrDie assertion (SIGABRT). This is a reachable-assertion bug (CWE-617) with availability-only impact and no data compromise. No public exploit has been identified at time of analysis, and it is not listed in CISA KEV; the issue was acknowledged upstream and fixed in PR #37207.
Denial of service in the Matter SDK (connectedhomeip) before version 1.4.0 allows remote attackers to crash a Matter device or controller by sending a groupcast InvokeCommand message without an initialized destination group ID. The ExchangeManager reads the optional GroupId via GetDestinationGroupId().Value() without a HasValue() guard (CWE-457), triggering a SIGABRT abort. An upstream fix exists (commit 0360cc3, PR #36729), and no public exploit has been identified at time of analysis; this is a network-reachable, unauthenticated availability issue with no confidentiality or integrity impact.
Denial of service in the Matter SDK (connectedhomeip) before 1.4.0 lets a remote unauthenticated attacker crash a smart-home device by sending a crafted read request. The flaw lives in the ReadRevisionAttribute function, which is reused across multiple clusters (Channel, Account Login, TargetNavigator), so any device exposing those clusters is affected. No public exploit identified at time of analysis, and the issue is availability-only (no code execution or data exposure).
Remotely triggerable denial of service in the Matter SDK (connectedhomeip) before 1.4.2 lets an attacker crash devices by driving the Level Control cluster's periodic server tick into a failed assertion (currentLevel < maxLevel). Sending a MoveToLevel command and immediately writing OperationMode=2 in the Pump Configuration and Control cluster produces an inconsistent internal state that aborts the process. No public exploit has been identified at time of analysis, and the flaw is not listed in CISA KEV; CVSS is 7.5 with availability-only impact.
Uncontrolled resource consumption in Adobe's C2PA Content Credentials Rust SDK, CLI tool (c2patool), and JavaScript web SDK allows a local attacker supplying a crafted input to exhaust system resources and crash the application. All three library families are affected across distinct runtimes - Rust, Node.js, and native binary - with patched releases available for each. No public exploit exists, SSVC classifies exploitation as none, and EPSS sits at the 5th percentile, indicating low real-world exploitation pressure despite the zero-user-interaction requirement.
Integer overflow in Adobe's Content Credentials SDK family (c2pa Rust SDK, c2pa-web JS SDK, and c2patool CLI) allows a local attacker to crash any application that processes a specially crafted C2PA manifest, resulting in denial of service. All three components share the vulnerable parsing logic and are affected across versions up to c2pa-v0.84.0, @contentauth/c2pa-web@0.7.0, and c2patool-v0.16.5 respectively. No public exploit exists and SSVC confirms no observed exploitation; however, patches are available and should be applied given the zero-privilege-required local trigger condition.
Improper input validation in Adobe's Content Credentials suite (C2PA Rust SDK, JS SDK, and c2patool CLI) allows a local attacker without privileges to crash the application by supplying malformed C2PA manifest content, resulting in a denial-of-service condition. Affected components span the Rust library (c2pa ≤ 0.84.0), the Node.js web SDK (@contentauth/c2pa-web ≤ 0.7.0), and the command-line tool (c2patool ≤ v0.16.5). No public exploit has been identified at time of analysis, and CISA SSVC rates exploitation status as none with non-automatable attack paths.
Integer underflow (CWE-191) in Adobe's Content Credentials ecosystem - spanning the Rust SDK (c2pa), JavaScript/Node.js SDK (c2pa-web), and c2patool command-line utility - crashes the application when processing a maliciously crafted C2PA manifest or media file, resulting in a denial-of-service condition. All three components share the same vulnerable code path, broadening the attack surface across toolchains. No public exploit has been identified at time of analysis; EPSS at 0.15% (5th percentile) and SSVC exploitation status of 'none' confirm this is not currently being targeted.
Integer underflow in Adobe's C2PA Content Credentials SDKs (Rust, JavaScript/Node.js, and CLI tool) allows an attacker to crash the host application by supplying a maliciously crafted C2PA manifest, resulting in a denial-of-service condition. All three release tracks are affected - the Rust SDK (≤0.84.0), the JS SDK (≤0.7.0), and c2patool (≤0.16.5) - with vendor-released patches available for each. No public exploit code has been identified at time of analysis, and EPSS sits at the 5th percentile, consistent with SSVC's 'exploitation: none' assessment.
Remote denial of service in the Matter SDK (connectedhomeip) versions 1.3 through 1.4 lets unauthenticated attackers crash smart-home devices by racing a Level Control MoveToLevel command against a conflicting write to the Pump Configuration and Control cluster's OperationMode attribute, tripping a reachable assertion (minLevel < currentLevel) in the server tick callback. The abort forces the device to restart or hang, disrupting any product built on the affected SDK. No public exploit identified at time of analysis, and the issue is tracked via project-chip GitHub issue #38619 with no vendor-released patch identified.
Unbounded in-memory state growth in nebula-mesh's OIDC login endpoint allows unauthenticated remote clients to cause availability degradation by flooding GET /ui/oidc/login, which allocates a new server-side state entry per request for a 10-minute TTL with no rate limit and no maximum live-state cap. Affected versions span v0.2.0 through v0.3.8; the attack requires only that OIDC be enabled and requires no credentials, IdP interaction, or user involvement. A publicly available PoC demonstrates 1,000 requests producing 1,000 live state entries with zero 429 responses; no public exploit identified at time of analysis as actively exploited (not in CISA KEV), though the low-barrier PoC meaningfully reduces the effort required.
Unbounded GPU resource allocation in NVIDIA TensorRT-LLM's OpenAI-compatible inference API allows an attacker to exhaust GPU resources on the host system, resulting in denial of service. Affected versions span all releases up to and including v1.3.0 rc14. No public exploit or active exploitation has been identified at time of analysis; SSVC classifies exploitation as none and technical impact as partial, consistent with a localized availability-only impact.
Denial of service in NVIDIA TensorRT-LLM (versions through v1.3.0 rc15) allows an attacker who can submit requests to the OpenAI-compatible inference API to trigger a reachable assertion in the sampler thread, crashing the inference service. The impact is limited strictly to availability - no confidentiality or integrity compromise is possible. No public exploit has been identified, EPSS sits at 0.12% (2nd percentile), and CISA SSVC rates exploitation status as none, placing this at low operational priority for most teams.
NVIDIA TensorRT-LLM versions through v1.3.0 rc14 exposes a gRPC server chat API endpoint susceptible to improper input validation (CWE-20), enabling a local attacker to crash the inference service and cause denial of service. The impact is strictly limited to availability - no code execution, confidentiality breach, or integrity compromise is possible. No public exploit code exists, EPSS sits at the 2nd percentile (0.12%), and CISA SSVC rates exploitation as 'none' with technical impact as 'partial', collectively indicating low urgency despite the moderate CVSS 6.2 score.
Server-side request forgery in NVIDIA TensorRT-LLM for Linux exposes AI inference servers to internal network pivoting via the multimodal media fetching subsystem. Versions up to and including v1.3.0 rc16 are affected, allowing a network-accessible attacker to coerce the server into issuing arbitrary outbound HTTP requests to internal or external targets, leading to information disclosure and denial of service. No public exploit code exists and CISA has not listed this in the KEV catalog; EPSS probability sits at 0.11% (2nd percentile), indicating very low observed exploitation pressure at time of analysis.
Memory leak in libsoup's HTTP/2 implementation allows a remote, unauthenticated attacker to incrementally exhaust heap memory and crash the affected application through a sustained out-of-memory condition. Affected deployments include any application linking libsoup on Red Hat Enterprise Linux 6 through 10 that handles HTTP/2 connections from untrusted peers. No public exploit code has been identified and CISA has not listed this in KEV; however, the network-accessible attack surface with no authentication requirement makes it relevant for internet-facing services using libsoup. Notably, the provided CVSS vector (C:H/I:N/A:N) is internally inconsistent with the DoS-only description - the correct impact metrics should reflect Availability, not Confidentiality, and this discrepancy is flagged in the risk assessment.
Heap buffer over-read in libsoup's HTTP/2 GOAWAY frame parser allows remote unauthenticated attackers to crash applications or leak heap memory fragments by sending a malformed frame with a non-NUL-terminated Additional Debug Data payload. Affected deployments include applications built on libsoup running on Red Hat Enterprise Linux 10 that accept or initiate HTTP/2 connections. A proof-of-concept exists per SSVC data, though exploitation is rated non-automatable and this vulnerability is not listed in the CISA KEV catalog at time of analysis.
Unbounded goroutine accumulation in Hoverfly v1.12.7 and earlier allows remote denial of service via its remote post-serve action feature. The unauthenticated admin API permits any network-reachable attacker to register a post-serve action pointing at a black-hole TCP endpoint, load a catch-all simulation, then flood the proxy port - each matching request spawns a goroutine that blocks indefinitely in `http.DefaultClient.Do()`, consuming approximately 66 KB each until the process is OOM-killed. A detailed proof-of-concept with verified memory measurements is publicly available in GitHub Security Advisory GHSA-42j2-w334-qxw7; no CISA KEV listing has been recorded at time of analysis.
Kernel crash in BlackBerry QNX Neutrino is triggerable by any local, unprivileged user via a malformed SchedGet() system call, resulting in full system availability loss. Affected platforms include QNX Software Development Platform 7.0 and 7.1, QNX OS for Safety (multiple branches up to 2.2.8), and QNX OS for Medical 2.0.2 and earlier. No active exploitation has been identified (EPSS 0.11%, CISA SSVC exploitation: none), but the safety-critical operational contexts in which QNX is deployed - automotive, medical devices, industrial automation - make a kernel crash disproportionately consequential relative to the moderate CVSS score.