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 (39897)
Denial of Service in Apache Neethi WS-Policy processor allows remote unauthenticated attackers to crash applications or cause resource exhaustion by sending crafted policy documents with circular references. The vulnerability (CVSS 7.5) triggers infinite loops or stack overflow during policy normalization when Policy A references Policy B which references Policy A. Apache released version 3.2.2 to address this flaw. With network vector, low complexity, and no authentication required (AV:N/AC:L/PR:N), this represents a readily exploitable attack surface for applications parsing untrusted WS-Policy documents, though no public exploit or active exploitation (KEV) has been identified at time of analysis.
Heap-based out-of-bounds reads in Open CASCADE Technology (OCCT) V8_0_0_rc5 STL ASCII parser allow local attackers to trigger denial of service or disclose process memory by convincing users to open maliciously crafted STL files with extremely short lines. The vulnerability stems from improper length validation of buffers returned by Standard_ReadLineBuffer::ReadLine() before strncasecmp operations or direct byte access in RWStl_Reader::ReadAscii. CVSS score of 7.1 reflects high confidentiality and availability impact requiring user interaction. No public exploit code, active exploitation (CISA KEV), or vendor patch information identified at time of analysis, though technical details are publicly available via GitHub Gist.
Heap-based out-of-bounds read in Open CASCADE Technology V8_0_0_rc5 OBJ file parser allows local attackers to cause denial of service or leak sensitive memory contents when victims open malicious OBJ files. The vulnerability stems from missing buffer length validation in RWObj_Reader::read() after Standard_ReadLineBuffer::ReadLine() returns minimal 1-byte buffers, leading to unsafe memory access at aLine + 2. EPSS data not available; no confirmed active exploitation or public proof-of-concept identified at time of analysis. Requires user interaction, limiting automated exploitation potential.
Denial of service in Open CASCADE Technology (OCCT) V8_0_0_rc5 occurs when a crafted VRML V2.0 file triggers null pointer dereference during shape construction in the VrmlData_IndexedFaceSet::TShape parser. Remote unauthenticated attackers can crash applications using libTKDEVRML.so by delivering malformed VRML files, requiring no user interaction (CVSS AV:N/AC:L/PR:N/UI:N). EPSS score not available; no public exploit identified at time of analysis. Affects 3D CAD/visualization applications integrating OCCT for VRML import.
Out-of-bounds memory read in openxc/isotp-c ISO-TP Single Frame handler allows adjacent network attackers to trigger denial of service or extract sensitive information via malicious CAN frames. The vulnerability exists in all versions through commit 5a5d19245f65 (August 2021) and stems from unchecked use of a 4-bit payload length field directly as memcpy buffer size. EPSS data unavailable; no CISA KEV listing indicates no confirmed widespread exploitation, though publicly available technical analysis exists (GitHub Gist reference).
Remote code execution in cannelloni v2.0.0 allows unauthenticated network attackers to crash the service or execute arbitrary code by sending malformed CAN FD frames that trigger buffer overflows in two separate parsing functions (parseCANFrame in parser.cpp and decodeFrame in decoder.cpp). The CVSS score of 9.8 reflects network-accessible exploitation requiring no authentication or user interaction, with complete system compromise possible. Public proof-of-concept code exists (GitHub Gist reference), elevating immediate exploitation risk despite no CISA KEV listing, suggesting targeted rather than mass exploitation scenarios.
Remote unauthenticated attackers can crash socketcand 0.4.2 daemon by sending a malformed CAN bus name that triggers a stack-based buffer overflow in the main function's socketcand.c implementation. The CVSS vector indicates network-accessible denial of service with no authentication required. A publicly available proof-of-concept exists (GitHub Gist reference), but CISA KEV status is not confirmed, and EPSS data is unavailable. The low attack complexity (AC:L) and network attack vector (AV:N) make this readily exploitable against exposed instances, though the impact is currently limited to availability (A:H) with no confirmed confidentiality or integrity impacts.
Remote code execution in Open Vehicle Monitoring System 3 (OVMS3) version 3.3.005 allows network-based attackers to execute arbitrary code or crash the system without authentication. A buffer overflow in the GVRET CAN data parser (canformat_gvret.cpp) fails to validate length fields in binary frames, enabling memory corruption. CVSS 10.0 reflects unauthenticated network vector with scope change, but no public exploit or active exploitation confirmed at time of analysis. EPSS data unavailable; real-world risk depends on OVMS3 deployment exposure (typically vehicle telematics environments).
Buffer overflow in Open Vehicle Monitoring System 3 (OVMS3) version 3.3.005 enables remote code execution when processing malicious PCAP files. The canformat_pcap.cpp parser fails to validate the phdr.len field, allowing attackers to overflow stack buffers and execute arbitrary code with high confidentiality, integrity, and availability impact. Public proof-of-concept code exists (GitHub Gist), though no active exploitation is confirmed by CISA KEV. SSVC assessment indicates automatable exploitation despite requiring user interaction to open crafted PCAP files.
Remote denial of service in Open-SAE-J1939 library (commit b6caf884 and prior, November 2025) allows unauthenticated attackers to crash SAE J1939 protocol implementations by sending malformed CAN frames to the J1939 bus. Exploitation is straightforward (CVSS AC:L, SSVC automatable:yes) and requires only network access to the CAN bus. No public exploit code confirmed, but GIST reference suggests proof-of-concept research exists. EPSS data unavailable; not in CISA KEV.
Remote code execution in Open Vehicle Monitoring System 3 (OVMS3) version 3.3.005 allows unauthenticated network attackers to execute arbitrary code or crash the system by sending malformed CANswitch frames with invalid DLC (Data Length Code) values. The buffer overflow occurs in the canformat_canswitch.cpp parser module which fails to validate frame length parameters before processing, enabling memory corruption. A proof-of-concept exploit is publicly available on GitHub, and SSVC assessment indicates the vulnerability is automatable with partial technical impact, though no active exploitation has been confirmed by CISA KEV at time of analysis.
Remote denial of service in FRRouting stable/10.0 allows unauthenticated attackers to crash the BGP daemon via malformed FlowSpec NLRI messages. The off-by-one vulnerability in bgp_flowspec_op_decode() enables out-of-bounds writes when parsing crafted BGP FlowSpec components, causing process termination. EPSS exploitation probability data not available, but SSVC marks this as automatable with partial technical impact. No public exploit code identified at time of analysis, and not listed in CISA KEV, suggesting theoretical rather than actively exploited risk.
Heap buffer overflow in Wireshark's SBC codec handler enables local code execution when processing malicious capture files. Affects Wireshark versions 4.4.0-4.4.14 and 4.6.0-4.6.4. The vulnerability requires user interaction (opening a crafted packet capture file) but no authentication, posing significant risk to network analysts who routinely process captures from untrusted sources. Wireshark Foundation has published security advisory WNPA-sec-2026-16 with remediation details. EPSS probability data not available; no evidence of active exploitation (not in CISA KEV) or public proof-of-concept at time of analysis.
Path traversal via profile import in Wireshark lets a malicious configuration profile archive write files outside the intended profile directory, causing denial of service and potentially arbitrary code execution when a user imports it. Affected builds are Wireshark 4.6.0-4.6.4 and 4.4.0-4.4.14, with the flaw triggered by user interaction (importing a crafted profile) rather than network traffic. EPSS is very low (0.01%) and there is no public exploit identified at time of analysis; a vendor patch is available.
Heap-based buffer overflow in Wireshark's RDP protocol dissector allows local attackers to cause denial of service or execute arbitrary code via maliciously crafted capture files. Affects Wireshark versions 4.6.0-4.6.4 and 4.4.0-4.4.14. The vulnerability requires user interaction (opening a malicious .pcap file) but no authentication, making it effective for social engineering attacks against network analysts. No active exploitation confirmed in CISA KEV, but proof-of-concept details available via GitLab issue tracker. EPSS data not available for risk prioritization.
Out-of-bounds read in the GnuTLS DTLS handshake reassembly logic lets remote unauthenticated attackers trigger an integer underflow by sending malformed handshake fragments with zero length and a non-zero offset, enabling information disclosure or denial of service against Red Hat-shipped GnuTLS (RHEL 6 through 10, OpenShift Container Platform 4, and Red Hat Hardened Images). Reported by Red Hat with a vendor patch available and errata released; no public exploit identified at time of analysis, and EPSS is very low (0.04%, 11th percentile) with SSVC exploitation status 'none'. CVSS 9.1 reflects high confidentiality and availability impact over the network at low complexity without authentication.
NULL pointer dereference in ASR Lapwing Linux's IMS client (sipuri.c) allows authenticated remote attackers to trigger service crashes and potentially execute code with changed scope. The vulnerability exists in the SIP URI parsing logic of the ASR1903 hardware platform's ims_client module. With CVSS 7.4 and scope change to Container, successful exploitation enables lateral impact beyond the vulnerable component. No CISA KEV listing or public exploit code identified at time of analysis, though EPSS data unavailable.
Heap overflow in Wireshark 4.6.0 through 4.6.4 TLS protocol dissector enables remote code execution when a user opens a malicious capture file or inspects crafted network traffic. The vulnerability requires user interaction (UI:R) but no authentication, making it exploitable via social engineering. No public exploit code identified at time of analysis, though the technical details are disclosed in vendor advisory wnpa-sec-2026-14 and tracked in GitLab issue #21090. CVSS 8.8 reflects the combination of network vector, low complexity, and potential for complete system compromise despite the user interaction requirement.
Remote unauthenticated attackers can crash the U-SPEED N300 V1.0.0 wireless router by flooding its web management interface with concurrent HTTP requests to random or non-existent endpoints, exhausting resources in the embedded Boa HTTP server until manual reboot is required. SSVC framework confirms proof-of-concept exploit code exists and the attack is fully automatable. CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates this is trivially exploitable from the internet without authentication, though impact is limited to availability disruption with no data compromise.
Remote attackers can crash Dbit N300 T1 Pro Easy Setup Wireless Wi-Fi Router V1.0.0 and disable all routing functionality by flooding the boa web server with HTTP GET requests to non-existent URIs. The attack exhausts file descriptors and memory buffers, causing kernel deadlock that kills both the web management interface and core routing services. SSVC framework confirms proof-of-concept exploit exists and the attack is fully automatable against default router configurations with no authentication required (CVSS AV:N/AC:L/PR:N/UI:N).
SAML signature validation in Admidio's Identity Provider implementation can be completely bypassed due to discarded return values in authentication flows. The validateSignature() method returns error strings on failure but both call sites (SSO and Single Logout handlers) discard the return value, allowing unsigned or invalidly-signed SAML requests to proceed. Attackers can forge AuthnRequests to exfiltrate logged-in users' personal data (username, email, real name, role memberships) to attacker-controlled endpoints, or forge LogoutRequests to terminate victim sessions and cascade logout across federated Service Providers. The smc_require_auth_signed configuration setting provides no protection. Public exploit code exists (PoC in GitHub advisory). CVSS 8.2 reflects network-accessible attack with no authentication required, though practical exploitation of the SSO path requires victim to have an active session. No active exploitation confirmed at time of analysis.
Unauthenticated remote attackers can crash n8n workflow automation instances by flooding the MCP OAuth client registration endpoint with large payloads, exhausting server memory and causing denial of service. The vulnerability affects all n8n instances regardless of whether MCP (Model Context Protocol) access is enabled, as the endpoint lacks authentication and resource controls. Vendor-released patches (1.123.32, 2.17.4, 2.18.1) impose registration limits and disable the endpoint when MCP is turned off. No public exploit identified at time of analysis, though the attack is trivial to execute given the unauthenticated nature of the endpoint.
Remote unauthenticated denial of service crashes GoBGP routing daemon via malformed BGP UPDATE message exploiting index-out-of-bounds panic. Attackers send crafted BGP UPDATE with AS4_PATH attribute preceding AS_PATH, causing slice index mismanagement in UpdatePathAttrs4ByteAs function (internal/pkg/table/message.go). Publicly available exploit code exists with hex-level proof-of-concept payload demonstrating immediate process termination. Affects GoBGP v4.2.0 and earlier; vendor-released patch v4.3.0 available per GitHub advisory GHSA-8rxh-r2p6-7f2q. CVSS 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) reflects network-accessible, low-complexity attack requiring no privileges, resulting in complete routing service disruption.
Remote denial of service via nil pointer dereference crashes GoBGP 4.3.0 when processing malformed BGP UPDATE messages containing unrecognized well-known path attributes. A single crafted UPDATE packet with an invalid Type Code (e.g., 0xEE or 0xFF) marked as well-known (Optional bit = 0) triggers a panic that terminates the entire BGP daemon process, not just the affected session. Publicly available exploit code exists with detailed proof-of-concept payloads confirmed by GitHub advisory GHSA-7235-89m6-f4px. Network-facing BGP deployments are at immediate operational risk despite CVSS 7.5, as BGP peering relationships make this trivially exploitable by any established peer.
CPU denial-of-service in the PHPOffice PhpSpreadsheet library (versions 2.0.0-2.1.15, 2.2.0-2.4.4, 3.3.0-3.10.4, and 4.0.0-5.6.0) allows remote attackers to hang application worker processes by uploading a ~1.6KB crafted XLSX file. The XLSX reader trusts the row number in a `<row r="...">` attribute without bounding it against the 1,048,576 row limit, so a single `<row r="999999999"/>` element inflates the cached highest row and forces roughly one billion iterations (~144s CPU burn) whenever the application iterates rows or uses getHighestRow() as a loop bound. Publicly available exploit code exists (a full PoC in the GitHub Security Advisory); EPSS is low at 0.04% (12th percentile) and it is not in CISA KEV.
Denial of service in PhpSpreadsheet's SpreadsheetML (Excel 2003 XML) reader lets a remote unauthenticated attacker exhaust server CPU with a single ~300-byte file. The Reader\Xml component fails to bound the ss:Index row attribute against AddressRange::MAX_ROW (1,048,576), so a crafted value like ss:Index="999999999" inflates cachedHighestRow to ~1 billion; any later getRowIterator() call then attempts ~1 billion iterations. A working proof-of-concept is published in the GitHub advisory, though this is not confirmed as actively exploited and EPSS risk is negligible (0.04%).
Denial of service and network-configuration corruption in Amazon's FreeRTOS-Plus-TCP embedded IP stack (versions 4.0.0-4.2.5 and 4.3.0-4.4.0) allows an adjacent-network attacker to send a single crafted DHCPv6 packet that triggers an integer underflow in the DHCPv6 sub-option parser, corrupting the device's IPv6 address, DNS settings, and lease times and permanently freezing the IP task until a hardware reset. Exploitation requires no authentication and no user interaction on any device with DHCPv6 enabled. There is no public exploit identified at time of analysis, EPSS risk is negligible (0.01%), and CISA SSVC rates exploitation as none, though the technical impact is assessed as total.
Client-side denial of service in the PostgreSQL JDBC Driver (pgjdbc) versions 42.2.0 through 42.7.10 lets a malicious, compromised, or attacker-controlled PostgreSQL server exhaust client CPU during SCRAM-SHA-256 authentication by advertising an extremely large PBKDF2 iteration count in the server-first-message. The affected Java client burns unbounded CPU inside PBKDF2 before authentication even fails, and because loginTimeout does not stop the worker thread, repeated or concurrent attempts can saturate cores and wedge connection pools. There is no public exploit identified at time of analysis, EPSS is negligible (0.02%), and it is not in CISA KEV; this is an availability-only issue with no authentication bypass, privilege escalation, or password disclosure.
Denial of service and potential heap buffer overflow in libsndfile 1.2.2's IMA ADPCM codec allows remote attackers to crash or corrupt memory in any application that parses an attacker-supplied WAV file. The flaw is an integer overflow in the frame-count calculation that was left unpatched in the WAV and close code paths after an incomplete fix for CVE-2022-33065. Publicly available exploit code exists, though EPSS is very low (0.04%, 12th percentile) and it is not on CISA KEV, indicating no observed active exploitation.
Remote unauthenticated denial-of-service in CoreDNS (all versions < 1.14.3) lets an attacker exhaust CPU and memory by flooding the DNS-over-HTTPS GET endpoint (/dns-query?dns=...) with oversized base64 payloads. Because the GET path performs URL query unescaping, base64 decoding, and DNS message unpacking before any size check, each request consumes significant resources despite ultimately returning 400 Bad Request. A detailed proof-of-concept with profiling data is published in the vendor advisory; publicly available exploit code exists, though EPSS is low (0.10%) and it is not on CISA KEV.
Unauthenticated remote denial-of-service in CoreDNS' DNS-over-QUIC (DoQ) server (versions before 1.14.3) lets an attacker exhaust memory and goroutines by opening many QUIC streams and sending only a single byte on each, stalling the DoQ length-prefix read. Because CoreDNS spawns a goroutine per accepted stream even when the configured worker_pool_size is full, and workers block indefinitely in io.ReadFull() with no per-stream read deadline, the process grows unbounded until OOM-kill. Publicly available exploit code exists (a Python reproducer demonstrating goroutine growth from 17 to over 15,000), though EPSS remains low at 0.14%; this stems from an incomplete fix/regression of CVE-2025-47950.
Renderer-level arbitrary code execution in Google Chrome's Media component affects all desktop builds prior to 147.0.7727.138, where a use-after-free (CWE-416) lets a remote attacker run code inside the browser sandbox when a victim loads a crafted HTML page. Google's own Chrome team reported it and Chromium rated it Medium severity because execution is confined to the sandboxed renderer rather than the host. There is no public exploit identified at time of analysis, and EPSS is very low at 0.04% (11th percentile), so no confirmed active exploitation exists.
Sandboxed remote code execution in Google Chrome's WebRTC component affects all desktop builds prior to 147.0.7727.138, where a crafted HTML page triggers a use-after-free (CWE-416) that lets a remote attacker run arbitrary code within the renderer sandbox. Google rates the Chromium severity as High and has shipped a fix in the Stable channel; there is no public exploit identified at time of analysis and the EPSS probability is negligible (0.01%). Exploitation requires the victim to visit an attacker-controlled page (UI:R), and code execution is confined to the sandbox unless chained with a separate sandbox-escape bug.
Sandboxed arbitrary code execution in Google Chrome for Android (WebView component) before 147.0.7727.138 allows a remote attacker to run code within the renderer sandbox by luring a victim to a crafted HTML page. The flaw is a use-after-free (CWE-416) rated High by Chromium and CVSS 8.8; there is no public exploit identified at time of analysis and EPSS is very low (0.03%). Exploitation requires user interaction (visiting attacker content) and, per the description, execution is contained inside the sandbox rather than achieving a full sandbox escape.
Heap corruption in Google Chrome's Cast component (versions prior to 147.0.7727.138) allows an attacker positioned on the same local network segment to trigger a use-after-free via malicious network traffic, potentially leading to code execution within the browser process. The flaw was reported internally by the Chrome team and carries a High Chromium severity, but there is no public exploit identified at time of analysis and EPSS scores exploitation probability at effectively 0%. It is not listed in CISA KEV, and CISA's SSVC assessment marks exploitation as none and the attack as not automatable.
Remote code execution in Google Chrome's Chromoting (Chrome Remote Desktop) component affects all desktop versions prior to 147.0.7727.138, where a use-after-free flaw lets a remote attacker corrupt memory and run arbitrary code by sending malicious network traffic to an active remote-desktop session. Google rates it High severity; there is no public exploit identified at time of analysis and it is not in CISA KEV, with an EPSS probability of only 0.01% (2nd percentile). A vendor patch is available, and SSVC scores exploitation as none but technical impact as total.
Remote code execution in Google Chrome's WebRTC component (versions prior to 147.0.7727.138) allows a remote attacker to run arbitrary code within the renderer sandbox by luring a victim to a crafted HTML page. The flaw is a use-after-free memory corruption reported by Google's own Chrome team; there is no public exploit identified at time of analysis and it is not listed in CISA KEV. EPSS is very low (0.01%), and CISA SSVC scores exploitation as 'none', indicating no observed exploitation despite the high technical severity.
Remote code execution in Google Chrome desktop before 147.0.7727.138 lets a remote attacker run arbitrary code inside the renderer sandbox by luring a victim to a crafted HTML page that triggers a use-after-free in the media component. Google rates the Chromium severity High and has shipped a fix; there is no public exploit identified at time of analysis and EPSS is very low (0.04%, 11th percentile). Notably the description confines code execution to inside the sandbox, so a separate sandbox-escape bug would be required for full host compromise.
Remote code execution in Google Chrome desktop before 147.0.7727.138 stems from a use-after-free in the browser's Codecs component, letting a remote attacker who lures a victim to a crafted HTML page corrupt memory and run arbitrary code within Chrome's renderer sandbox. Rated High severity by Chromium with CVSS 8.8, it requires user interaction (visiting a malicious page) but no authentication. There is no public exploit identified at time of analysis and it is not listed in CISA KEV; EPSS is very low at 0.01%.
Sandboxed remote code execution in Google Chrome's Cast component affects all desktop builds prior to 147.0.7727.138, where a CWE-416 use-after-free lets an attacker on the same local network segment run arbitrary code inside the Chromium sandbox by sending malicious network traffic. Chromium rates the flaw High severity, but SSVC records no observed exploitation and EPSS is 0.00%, and no public exploit has been identified at time of analysis. Google has shipped a fixed Stable channel build.
Sandbox escape in Google Chrome's WebMIDI component (versions prior to 147.0.7727.138) allows a remote attacker who has already compromised the renderer process to break out of the browser sandbox using a crafted HTML page. Rated High by Chromium and carrying a CVSS of 8.3 with a scope-change (S:C) impact, it is a use-after-free (CWE-416) that Google has patched in the Stable channel. There is no public exploit identified at time of analysis, and EPSS exploitation probability is very low at 0.01%.
Sandbox escape in Google Chrome for Android (Media component) prior to 147.0.7727.138 lets a remote attacker who has already compromised the renderer process break out of the browser sandbox by serving a crafted HTML page that triggers a use-after-free (CWE-416). Chromium rates the severity High and a vendor patch is available; no public exploit is identified, EPSS is very low (0.01%, 1st percentile), and SSVC records exploitation status 'none'. It is a second-stage escape rather than an initial-access primitive, so it must be chained with a prior renderer compromise to have real impact.
Remote code execution in Google Chrome desktop builds prior to 147.0.7727.138 arises from a use-after-free in the Navigation component, letting a remote attacker who lures a victim to a crafted HTML page corrupt memory and execute arbitrary code in the renderer context. Chromium rates the flaw High severity and CVSS scores it 8.8, but there is no public exploit identified at time of analysis and EPSS is very low at 0.04% (11th percentile). A vendor patch is available and CISA's SSVC framework currently records exploitation as none.
Heap corruption in the GPU component of Google Chrome before 147.0.7727.138 lets an attacker who has already compromised the renderer process escalate impact via a use-after-free triggered by a crafted HTML page. This is a High-severity Chromium memory-corruption bug reported internally by Chrome, with a vendor patch shipped in the April 2026 stable channel update and no public exploit identified at time of analysis. EPSS is minimal (0.01%) and CISA SSVC records exploitation status as none, though technical impact is rated total.
Heap corruption in the Views UI component of Google Chrome on macOS (versions prior to 147.0.7727.138) lets a remote attacker trigger a use-after-free by luring a victim to a crafted HTML page, potentially leading to arbitrary code execution. Rated High by Chromium with a CVSS of 8.8; no public exploit identified at time of analysis, EPSS is very low (0.01%), and CISA SSVC lists exploitation as none.
Remote code execution in Google Chrome desktop before 147.0.7727.138 arises from a use-after-free in the Animation component (CWE-416), allowing a remote attacker who lures a victim to a crafted HTML page to execute arbitrary code, though execution is constrained to inside the renderer sandbox. Chromium rates the severity High and a vendor patch is available; there is no public exploit identified at time of analysis, EPSS is very low (0.01%), and CISA SSVC marks exploitation as none.
Sandbox escape in Google Chrome's ANGLE graphics abstraction layer (versions prior to 147.0.7727.138) lets an attacker who already controls a compromised renderer process break out of the browser sandbox by loading a crafted HTML page. Rated High severity by Chromium with a CVSS of 8.8, it is a use-after-free (CWE-416) memory-corruption bug used as the second stage of a browser exploit chain. There is no public exploit identified at time of analysis, EPSS is negligible (0.01%), and CISA's SSVC framework records exploitation status as none.
Sandbox escape in Google Chrome's GPU process prior to 147.0.7727.138 lets a remote attacker corrupt memory via a use-after-free when a victim visits a crafted HTML page, potentially breaking out of the renderer sandbox. Rated High by Chromium and scored CVSS 9.6 due to the scope change (S:C) inherent to a sandbox escape, though it requires user interaction (visiting a page). There is no public exploit identified at time of analysis, EPSS is very low (0.03%), and it is not on CISA KEV.
Sandbox escape in Google Chrome for Windows (versions prior to 147.0.7727.138) stems from a use-after-free in the Views UI component, allowing an attacker who has already compromised the renderer process to break out of the browser sandbox and gain broader code execution on the host via a crafted HTML page. Chromium rates the internal severity as Critical, though the assigned CVSS is 7.5 due to the high attack complexity and the renderer-compromise prerequisite. This is a second-stage bug: there is no public exploit identified at time of analysis, EPSS is very low (0.03%, 10th percentile), and it is not listed in CISA KEV.
Sandbox escape in Google Chrome on Windows (versions prior to 147.0.7727.138) leverages a use-after-free flaw in the browser's Accessibility component, allowing a remote attacker who has already compromised the renderer process to break out of the sandbox and gain higher-privileged code execution via a crafted HTML page. Rated Critical by Chromium and CVSS 8.8, the bug is patched but has no public exploit identified at time of analysis, and its EPSS score is very low (0.01%). This is a second-stage primitive typically chained with a separate renderer-RCE bug rather than exploited in isolation.
Heap corruption via use-after-free in Google Chrome (iOS) before 147.0.7727.138 allows a remote attacker to potentially execute code or crash the browser when a victim opens a crafted HTML page. Chromium rates the flaw Critical severity, though there is no public exploit identified at time of analysis and EPSS exploitation probability is negligible (0.01%). Exploitation requires the victim to load attacker-controlled web content (UI:R).
Remote code execution in Google Chrome (Canvas component) on Linux and ChromeOS before 147.0.7727.138 lets a remote attacker run arbitrary code within the renderer sandbox by luring a victim to a crafted HTML page. Rated Critical by Chromium, the flaw is a Canvas use-after-free (CWE-416); code execution is confined to the sandboxed renderer rather than the host OS. No public exploit identified at time of analysis and EPSS is very low (0.01%), though SSVC rates technical impact as total and the attack as automatable.
Resource exhaustion in OpenClaw before 2026.3.31 allows remote unauthenticated attackers to crash servers by sending malicious Microsoft Teams webhook payloads. The application parses request bodies before performing JWT validation, enabling attackers to bypass authentication and trigger denial-of-service conditions. A vendor patch is available via GitHub commit 3834d47, with no evidence of active exploitation (not in CISA KEV) and no public POC identified at time of analysis.
Denial of service in OpenClaw (pre-2026.3.28) allows remote unauthenticated attackers to exhaust server resources by flooding the application with concurrent WebSocket upgrade requests. The vulnerability stems from lack of rate-limiting and resource budgeting before authentication, enabling attackers to monopolize socket and worker thread capacity and block legitimate WebSocket clients. No active exploitation confirmed (not in CISA KEV), but the technical barrier is low given unauthenticated network access (CVSS:4.0 AV:N/AC:L/PR:N). VulnCheck reported this vulnerability with vendor advisory available on GitHub.
Authentication bypass in NVIDIA NVFlare Dashboard allows remote unauthenticated attackers to escalate privileges through user-controlled key manipulation in the authentication system. The vulnerability affects the NVIDIA Flare SDK and enables complete system compromise including arbitrary code execution, data tampering, information disclosure, and denial of service. With a CVSS score of 9.8 (critical severity) and maximum exploitability metrics (AV:N/AC:L/PR:N/UI:N), this represents a severe security flaw requiring immediate remediation, though no active exploitation (KEV) or public exploit code has been identified at time of analysis.
Integer overflow in Apache Thrift's Go TFramedTransport implementation allows remote unauthenticated attackers to crash server processes via specially crafted uint32 values. Affects all Thrift versions prior to 0.23.0 with EPSS score of 0.02% (low exploitation probability). This is one of six related vulnerabilities disclosed simultaneously affecting different Thrift language bindings (Go, Swift, Java, c_glib), indicating coordinated security audit findings. Vendor patch available in version 0.23.0 released April 2026.
Integer overflow in Apache Thrift Swift Compact Protocol implementation versions prior to 0.23.0 enables remote unauthenticated attackers to achieve partial confidentiality, integrity, and availability impact. This is one of six related vulnerabilities disclosed simultaneously affecting multiple Apache Thrift language implementations (Swift, Node.js, C++, c_glib, Go). EPSS score of 0.02% (5th percentile) indicates low current exploitation probability, with no active exploitation confirmed by CISA KEV at time of analysis. Vendor-released patch version 0.23.0 addresses this and related Thrift implementation flaws.
Apache Thrift Java TSSLTransportFactory fails to verify server hostnames in TLS connections, enabling man-in-the-middle attacks against versions prior to 0.23.0. This CWE-297 (improper certificate validation) vulnerability allows network attackers with high complexity positioning to intercept and modify encrypted communications without authentication. EPSS exploitation probability is low (0.01%, 1st percentile), with no KEV listing or public exploit code identified at time of analysis. Vendor patch available in Thrift 0.23.0.
Remote denial of service in MIT Kerberos 5 (krb5) before 1.22.3 lets an unauthenticated attacker crash any GSS-API acceptor that has a NegoEx mechanism registered in /etc/gss/mech. Sending a malformed NegoEx token to an application that calls gss_accept_sec_context() triggers a NULL pointer dereference in parse_nego_message, terminating the process (CWE-476). No public exploit identified at time of analysis; EPSS is low (0.07%) and CISA SSVC lists exploitation as proof-of-concept only, with technical impact rated partial and not automatable.
Use-after-free in Linux kernel driver core allows local authenticated users to execute arbitrary code, escalate privileges, or crash the system via race condition in device-driver binding operations. The vulnerability stems from inconsistent locking in driver_match_device() function calls, specifically affecting driver_override functionality where device_lock was not held during bind_store() and __driver_attach() operations. EPSS probability is very low (0.02%, 5th percentile), indicating minimal real-world exploitation observed. No active exploitation confirmed - no CISA KEV listing identified. Patch available in kernel 7.0+ and backport commit dc23806a7c47.
Local privilege escalation in Canonical's authd (the Ubuntu authentication daemon for external identity providers) prior to 0.6.4 arises from a logic error that resets a user's primary group ID (GID) to their UID when their identity-provider record changes. Affected are users whose primary GID legitimately differs from their UID - created under authd < 0.5.4 or reassigned via 'authctl group set-gid' - causing newly created files and directories to be misowned by an unintended group. Publicly available exploit code exists, but there is no public exploit identified as actively used; SSVC records exploitation status as none and EPSS is negligible (0.01%).
Atom table exhaustion in plug_cowboy 2.0.0-2.8.0 allows remote denial of service via HTTP/2. Unauthenticated attackers can crash the Erlang VM by sending HTTP/2 requests with unique :scheme pseudo-header values, permanently filling the non-garbage-collected atom table until the system_limit is reached. Affects only HTTP/2 connections; HTTP/1.1 is not vulnerable. CVSS 8.7 (High) with network attack vector, low complexity, and no required privileges. No active exploitation confirmed (not in CISA KEV), but exploit is trivial given the publicly documented attack mechanism in the GitHub advisory.
Use-after-free in Foxit PDF Reader and Foxit PDF Editor allows arbitrary code execution when specially crafted PDF documents trigger UI refresh operations after comment deletion via scripting. Local attackers can deliver malicious PDFs and achieve code execution with high integrity and confidentiality impact once a user opens the file. CVSS 7.8 indicates high severity but requires user interaction, limiting automated exploitation. No public exploit code or active exploitation confirmed at time of analysis.
Use-after-free in Foxit PDF Reader and Foxit PDF Editor allows local attackers to execute arbitrary code or crash the application via specially crafted PDF documents. When scripts modify document structures, the software fails to maintain valid object references during page information queries, enabling pointer dereference of freed memory. Successful exploitation requires user interaction to open a malicious PDF file, achieving high confidentiality, integrity, and availability impact with CVSS 7.8. No active exploitation or public exploit code identified at time of analysis, though CVSS vector indicates low attack complexity once victim interaction occurs.
Memory corruption in Foxit PDF Reader and Foxit PDF Editor allows local attackers to crash the application or potentially execute arbitrary code through specially crafted PDF files with malformed form field hierarchies. The vulnerability triggers when parsing logic misidentifies non-signature data as valid signatures, causing invalid memory writes during internal data structure construction. User interaction is required to open the malicious PDF document. No active exploitation has been identified at time of analysis, though the local attack vector and high CVSS score (7.8) warrant attention for endpoint security in environments handling untrusted PDF files.
Denial of service in Aegra, an open-source Agent Protocol server (vulnerable at commit e9a89f), lets remote unauthenticated attackers exhaust server resources by sending a crafted POST request to the /store/items/search endpoint. The flaw is classified as uncontrolled resource consumption (CWE-400) and carries CVSS 7.5 with an availability-only impact; publicly available exploit code exists via a referenced gist, but there is no evidence of active exploitation and the EPSS probability is negligible (0.01%).
Denial of service in MERCURY MIPC252W IP camera firmware 1.0.5 Build 230306 Rel.79931n allows remote unauthenticated attackers to crash the device via malformed RTSP SETUP request. Exploitation triggers a null pointer dereference in the RTSP service during Transport header parsing, forcing an automatic reboot. EPSS score of 0.01% indicates very low observed exploitation probability, and no active exploitation or public proof-of-concept has been identified at time of analysis beyond the researcher's GitHub documentation.
Use-after-free in the Linux kernel IPv6 flowlabel subsystem lets a local user crash the system by racing a read of /proc/net/ip6_flowlabel against the early free of an exclusive flowlabel's option block. When fl_release() drops fl->users to zero it immediately kfree()s fl->opt, while the enclosing struct ip6_flowlabel stays visible in the global hash until later RCU garbage collection, so a concurrent ip6fl_seq_show() reader dereferences freed memory. There is no public exploit identified at time of analysis, and EPSS is 0.02% (7th percentile), consistent with a low-value local denial-of-service bug rather than a widely exploited flaw.
Unauthenticated database writes in CyberPanel versions before 2.4.4 allow remote attackers to abuse two AI Scanner worker endpoints (/api/ai-scanner/status-webhook and /api/ai-scanner/callback) that ship without authentication checks (CWE-306). Because no credentials are required (CVSS 4.0 PR:N/UI:N), any attacker who can reach the panel can flood the database, corrupt scan-history records, and pollute stored fields, degrading integrity and availability. Publicly available exploit code exists and the flaw was reported by VulnCheck, though EPSS remains low at 0.21% and it is not listed in CISA KEV.
Integer overflow in OP-TEE OS RSA signature encoding crashes the Trusted Execution Environment on platforms with RSA hardware acceleration. Affects versions 3.8.0 through 4.10 when attackers supply cryptographic operations with deliberately undersized RSA moduli, causing memset() to overwrite memory until the TEE crashes. This denial-of-service attack requires no authentication and can be triggered remotely (CVSS AV:N/PR:N), completely disabling the secure-world environment that protects cryptographic keys, biometric data, and DRM operations on affected Arm TrustZone systems. EPSS data not available; no active exploitation confirmed at time of analysis.
Unauthenticated remote attackers can crash Node.js applications using marked versions 18.0.0-18.0.1 by sending a specially crafted 3-byte sequence (tab, vertical tab, newline). The infinite recursion loop exhausts memory and triggers an out-of-memory crash, enabling complete denial of service against any exposed markdown parsing endpoint. Vendor-released patch fixes the vulnerability in version 18.0.2. No public exploit identified at time of analysis, though the attack input is trivially simple and reproducible. CVSS v4.0 8.7 reflects high availability impact with network reachability and no authentication barriers.
Unbounded memory allocation in Eclipse zserio serialization framework allows remote attackers to trigger system crashes via crafted payloads as small as 4-5 bytes, forcing allocations up to 16 GB and causing out-of-memory errors. Affects both C++ and Java runtimes used in Navigation Data Standard (NDS) implementations deployed across millions of vehicles from Toyota, BMW, Volkswagen, Mercedes-Benz, and 39 other automotive manufacturers. Vendor-released patch available in zserio v2.18.1, addressing unchecked length parameters in Array.h, BitStreamReader.h, and Java runtime equivalents. CVSS 7.5 (AV:N/AC:L/PR:N/UI:N) indicates trivial remote exploitation without authentication.
Pre-authentication NoSQL injection in Dgraph allows remote unauthenticated attackers to exfiltrate entire databases and modify schemas via crafted JSON mutation keys. The vulnerability exploits unsanitized language tag fields in the addQueryIfUnique function, enabling DQL query injection through specially crafted HTTP POST requests to port 8080. Attackers can extract all database contents including credentials, secrets, and AWS keys with two HTTP requests against default configurations where ACL is disabled. CVSS 9.1 (Critical) with network vector, no authentication required, and low attack complexity. No public exploit code confirmed outside the GitHub advisory, though a complete proof-of-concept with video demonstration exists in the advisory. EPSS data not available for this recent CVE.
Remote unauthenticated attackers can exfiltrate all data from Dgraph databases via DQL injection in the /mutate endpoint's cond parameter. Default configurations with ACL disabled allow single HTTP POST requests to bypass authentication and execute arbitrary read queries, returning complete database contents including credentials, PII, and secrets. The vulnerability exploits unsanitized string concatenation in buildUpsertQuery() where user-supplied cond values are written directly into DQL queries without escaping or validation. Proof-of-concept demonstrates extraction of AWS credentials, GCP service account keys, and user secrets in a single request. No public exploitation confirmed at time of analysis, but POC code publicly available via GitHub advisory. EPSS data not available; CVSS 9.1 indicates critical severity with network vector and no authentication required.
Use-after-free in Linux kernel batman-adv (B.A.T.M.A.N. Advanced mesh networking) allows remote network attackers to trigger memory corruption and potentially execute arbitrary code. The batadv_bla_add_claim() function can prematurely drop a gateway reference while readers still access the pointer, causing netlink dump and claim-check paths to dereference freed memory. Despite CVSS 9.8 critical rating, exploitation probability is low (EPSS 2%, 7th percentile), no active exploitation confirmed, and patches available across kernel stable branches 6.1.169, 6.6.135, 6.12.82, 6.18.23, 6.19.13, and mainline 7.0.
Race condition in Linux kernel memory management allows local attackers with low privileges to corrupt kernel page state, potentially achieving high-impact denial of service, data corruption, or privilege escalation. The vulnerability affects kernel versions 6.6.x through 7.0-rc3, with patches confirmed released for stable branches 6.6.135, 6.12.82, 6.18.23, 6.19.13, and mainline 7.0. EPSS exploitation probability is low (0.02%, 5th percentile), and no public exploit code or active exploitation has been identified at time of analysis. The CVSS vector (AV:L/AC:L/PR:L/UI:N) indicates local access with low attack complexity, while the specific race condition requires precise timing between file mapping and inode size modification operations.
Null pointer dereference in Linux kernel rxrpc subsystem allows remote network attackers to crash the system by sending malformed packets to a client-side connection after a call has been torn down. The flaw affects Linux kernel versions 6.2 onward where the rxrpc client code unconditionally releases a call reference that was never acquired, converting a protocol error into a kernel panic. Vendor patches are available across stable branches (6.6.135, 6.12.82, 6.18.23, 6.19.13, 7.0). EPSS exploitation probability is low (0.02%, 5th percentile) and no public exploit has been identified at time of analysis.
Kernel panic in Linux arm64 memory management causes system crash when handling invalid large leaf page table mappings during DMA bounce buffer operations. ARM64 systems running Linux 7.0-rc4 and earlier (specifically kernels with commit a166563e7ec37 that introduced large block mapping support) crash with translation faults when components like SWIOTLB, secretmem, kfence, or realm DMA attempt to invalidate large leaf mappings. Exploitation requires no special privileges as this is triggered by normal kernel operations during boot or DMA activity. Vendor patches available across stable branches (6.18.24, 6.19.14, 7.0.1). EPSS score is 1st percentile (0.01%) indicating extremely low observed exploitation probability, consistent with this being an availability issue requiring specific ARM64 hardware configurations rather than a remotely exploitable vulnerability.
Use-after-free in Linux kernel blk-cgroup subsystem allows local authenticated users to potentially execute arbitrary code, escalate privileges, or crash the system. The vulnerability occurs in cgwb_release_workfn() when releasing cgroup writeback structures, where a CSS reference is dropped before subsequent dereference, creating a race condition. Meta reports sporadic crashes in production across multiple kernel versions. Patches available for stable branches 6.12.83, 6.18.24, 6.19.14, and 7.0.1. EPSS score of 0.02% suggests low widespread exploitation probability, and no active exploitation or public POC identified at time of analysis.
Local privilege escalation and denial of service in the Linux kernel's em28xx USB media driver arises from a use-after-free (CWE-416) in em28xx_v4l2_open(), which reads dev->v4l2 without holding dev->lock. A local attacker who can open the V4L2 device node during a race with the driver's init error path or teardown can trigger a use-after-free on the embedded video_device (via v4l2_fh_init accessing vdev->ctrl_handler) or a NULL dereference in em28xx_resolution_set(). No public exploit identified at time of analysis, and EPSS is very low (0.02%), consistent with a hard-to-win kernel race requiring physical/local USB device presence.
Local privilege escalation and denial of service in the Linux kernel's bcache subsystem stems from a use-after-free of the cached_dev.sb_bio structure; if a cached backing device is stopped while a superblock write is in flight, the freed bio is dereferenced at I/O completion (endio), corrupting kernel memory. Affected systems are those running bcache-backed block devices (observed crashing via librbd/libceph rbd workloads), where a local user with the ability to trigger device teardown during superblock activity can crash the host or potentially corrupt kernel memory. This carries no public exploit identified at time of analysis and an EPSS of just 0.02%, consistent with a hard-to-time race rather than a readily weaponized flaw.
Denial of service via CPU soft lockup in Linux kernel's wlcore Wi-Fi driver (versions 5.10 through 7.0) occurs when memory allocation fails during wireless frame transmission. Incorrect error code return (-EAGAIN instead of -ENOMEM) triggers infinite retry loop while holding critical mutex, causing system unresponsiveness. Vendor-released patches available across all affected stable kernel branches (5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10, 7.0). CVSS 7.5 (High) reflects network attack vector with no authentication required, though EPSS score of 0.02% (7th percentile) indicates low observed exploitation probability. No active exploitation confirmed (not in CISA KEV); no public exploit identified at time of analysis.
Use-after-free race condition in Linux kernel Wi-Fi cfg80211 subsystem allows local authenticated users to trigger kernel crashes or potentially execute code. When a nl80211 socket closes while a peer measurement (PMSR) request is active, concurrent interface teardown can leave a scheduled work item (pmsr_free_wk) that later invokes the driver's abort callback on already-freed interface structures. EPSS score of 0.02% (7th percentile) indicates very low probability of exploitation in the wild. Patches available across all supported kernel branches since commit 9bb7e0f24e7e (introduced in Linux 5.0), with fixes released in stable versions 6.1.167, 6.6.130, 6.12.78, 6.18.20, and 6.19.10.
Denial of service in Grafana Tempo allows unauthenticated remote attackers to exhaust server memory by sending trace queries with excessively large result limits. The vulnerability causes unbounded memory allocation during query processing, degrading or halting service availability depending on deployment resources. EPSS data not available; no CISA KEV listing or public exploit identified at time of analysis. Mitigation available through configuration change rather than software patch.
Remote unauthenticated attackers can trigger denial of service in Delta Electronics AS320T industrial automation devices by invoking an undocumented subfunction. The vulnerability allows network-accessible exploitation without credentials against default configurations, potentially disrupting critical industrial control operations. Delta Electronics confirmed the flaw in PCSA-2026-00006, grouped with three other CVEs affecting the same product line.
Denial of service in basic-ftp for Node.js allows remote malicious FTP servers to crash client applications via unbounded memory consumption during directory listing operations. Attackers controlling or compromising an FTP server can send infinite or extremely large listing responses to Client.list() calls, exhausting client memory until process termination. Unauthenticated network attack with low complexity (CVSS:3.1 AV:N/AC:L/PR:N). No public exploit identified at time of analysis, though attack concept is straightforward for anyone operating a malicious FTP server.
A type assertion bug in Kyverno's forEach mutation handler crashes the cluster-wide background controller into CrashLoopBackOff and blocks admission controller operations, causing denial of service for policy-matched resources. Any authenticated user with Policy or ClusterPolicy creation permissions can trigger the crash by creating a malformed policy. The vulnerability affects Kyverno versions prior to 1.17.2 and 1.16.4, is limited to the legacy policy engine (CEL-based policies unaffected), and persists until the malicious policy is deleted. Vendor-released patches available with confirmed fix commits on GitHub.
Resource exhaustion in Open Source Social Network (OSSN) versions prior to 9.0 allows remote unauthenticated attackers to trigger Denial of Service by uploading specially crafted images with extreme pixel dimensions (e.g., 10000×10000). While the compressed file size appears small, server-side decompression and resizing allocates excessive memory and CPU, crashing or degrading service. EPSS exploitation probability data not available, but the attack vector is straightforward (AV:N/AC:L/PR:N) with publicly documented technical details and fix commit available on GitHub. CVSS 8.2 reflects the easy remote exploitation path despite limited confidentiality impact.
Denial of service in libxml2 allows a remote attacker to crash any application that uses the library to XSD-validate an attacker-supplied XML document containing an internal entity reference. The flaw is a CWE-843 type confusion triggered during schema validation, affecting a wide range of Red Hat products that ship libxml2. No public exploit identified at time of analysis, and EPSS is very low (0.01%, 3rd percentile), consistent with SSVC exploitation status of 'none'.
Denial of service in OpenClaw before 2026.3.31 lets remote attackers exhaust image-gateway memory by submitting a decompression bomb - a tiny compressed image that decodes to an enormous pixel count. The pixel-limit guard fails open on the sips backend, so oversized images are decoded before any size check runs. EPSS is very low (0.03%, 9th percentile) and there is no public exploit identified at time of analysis; a vendor patch (2026.3.31) is available.