Linux Kernel nouveau
CVE-2024-27062
HIGH
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Race condition requires concurrent timing (AC:H); local GPU device access with low-privileged user (AV:L/PR:L); confirmed kernel crash and memory corruption (C:H/I:H/A:H).
Primary rating from Vendor (416baaa9-dc9f-4396-8d5f-8c081fb06d67).
CVSS VectorVendor: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Lifecycle Timeline
7DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
nouveau: lock the client object tree.
It appears the client object tree has no locking unless I've missed something else. Fix races around adding/removing client objects, mostly vram bar mappings.
4562.099306] general protection fault, probably for non-canonical address 0x6677ed422bceb80c: 0000 [#1] PREEMPT SMP PTI [ 4562.099314] CPU: 2 PID: 23171 Comm: deqp-vk Not tainted 6.8.0-rc6+ #27 [ 4562.099324] Hardware name: Gigabyte Technology Co., Ltd. Z390 I AORUS PRO WIFI/Z390 I AORUS PRO WIFI-CF, BIOS F8 11/05/2021 [ 4562.099330] RIP: 0010:nvkm_object_search+0x1d/0x70 [nouveau] [ 4562.099503] Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 0f 1f 44 00 00 48 89 f8 48 85 f6 74 39 48 8b 87 a0 00 00 00 48 85 c0 74 12 <48> 8b 48 f8 48 39 ce 73 15 48 8b 40 10 48 85 c0 75 ee 48 c7 c0 fe [ 4562.099506] RSP: 0000:ffffa94cc420bbf8 EFLAGS: 00010206 [ 4562.099512] RAX: 6677ed422bceb814 RBX: ffff98108791f400 RCX: ffff9810f26b8f58 [ 4562.099517] RDX: 0000000000000000 RSI: ffff9810f26b9158 RDI: ffff98108791f400 [ 4562.099519] RBP: ffff9810f26b9158 R08: 0000000000000000 R09: 0000000000000000 [ 4562.099521] R10: ffffa94cc420bc48 R11: 0000000000000001 R12: ffff9810f02a7cc0 [ 4562.099526] R13: 0000000000000000 R14: 00000000000000ff R15: 0000000000000007 [ 4562.099528] FS: 00007f629c5017c0(0000) GS:ffff98142c700000(0000) knlGS:0000000000000000 [ 4562.099534] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4562.099536] CR2: 00007f629a882000 CR3: 000000017019e004 CR4: 00000000003706f0 [ 4562.099541] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 4562.099542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 4562.099544] Call Trace: [ 4562.099555] <TASK> [ 4562.099573] ? die_addr+0x36/0x90 [ 4562.099583] ? exc_general_protection+0x246/0x4a0 [ 4562.099593] ? asm_exc_general_protection+0x26/0x30 [ 4562.099600] ? nvkm_object_search+0x1d/0x70 [nouveau] [ 4562.099730] nvkm_ioctl+0xa1/0x250 [nouveau] [ 4562.099861] nvif_object_map_handle+0xc8/0x180 [nouveau] [ 4562.099986] nouveau_ttm_io_mem_reserve+0x122/0x270 [nouveau] [ 4562.100156] ? dma_resv_test_signaled+0x26/0xb0 [ 4562.100163] ttm_bo_vm_fault_reserved+0x97/0x3c0 [ttm] [ 4562.100182] ? __mutex_unlock_slowpath+0x2a/0x270 [ 4562.100189] nouveau_ttm_fault+0x69/0xb0 [nouveau] [ 4562.100356] __do_fault+0x32/0x150 [ 4562.100362] do_fault+0x7c/0x560 [ 4562.100369] __handle_mm_fault+0x800/0xc10 [ 4562.100382] handle_mm_fault+0x17c/0x3e0 [ 4562.100388] do_user_addr_fault+0x208/0x860 [ 4562.100395] exc_page_fault+0x7f/0x200 [ 4562.100402] asm_exc_page_fault+0x26/0x30 [ 4562.100412] RIP: 0033:0x9b9870 [ 4562.100419] Code: 85 a8 f7 ff ff 8b 8d 80 f7 ff ff 89 08 e9 18 f2 ff ff 0f 1f 84 00 00 00 00 00 44 89 32 e9 90 fa ff ff 0f 1f 84 00 00 00 00 00 <44> 89 32 e9 f8 f1 ff ff 0f 1f 84 00 00 00 00 00 66 44 89 32 e9 e7 [ 4562.100422] RSP: 002b:00007fff9ba2dc70 EFLAGS: 00010246 [ 4562.100426] RAX: 0000000000000004 RBX: 000000000dd65e10 RCX: 000000fff0000000 [ 4562.100428] RDX: 00007f629a882000 RSI: 00007f629a882000 RDI: 0000000000000066 [ 4562.100432] RBP: 00007fff9ba2e570 R08: 0000000000000000 R09: 0000000123ddf000 [ 4562.100434] R10: 0000000000000001 R11: 0000000000000246 R12: 000000007fffffff [ 4562.100436] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 4562.100446] </TASK> [ 4562.100448] Modules linked in: nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables libcrc32c nfnetlink cmac bnep sunrpc iwlmvm intel_rapl_msr intel_rapl_common snd_sof_pci_intel_cnl x86_pkg_temp_thermal intel_powerclamp snd_sof_intel_hda_common mac80211 coretemp snd_soc_acpi_intel_match kvm_intel snd_soc_acpi snd_soc_hdac_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof_intel_hda_mlink ---truncated---
AnalysisAI
Race condition in the Linux kernel's nouveau (open-source NVIDIA) GPU driver allows a local low-privileged user to trigger kernel memory corruption, information disclosure, or a system crash by exploiting missing locking on the client object tree during concurrent VRAM BAR mapping operations. The crash trace confirms a general protection fault at nvkm_object_search triggered by deqp-vk (Vulkan workloads), reading a non-canonical kernel pointer (0x6677ed422bceb80c), indicating a use-after-free or corrupted pointer dereference. No public exploit code and no CISA KEV listing exist at time of analysis; the EPSS score of 0.17% (7th percentile) reflects low observed exploitation probability, but the local privilege escalation potential warrants patching on affected systems.
Technical ContextAI
The nouveau driver is the in-tree Linux kernel open-source driver for NVIDIA GPUs (cpe:2.3:o:linux:linux_kernel:*). The vulnerability (CWE-362: Race Condition) manifests in the nvkm client object tree - a kernel-internal data structure tracking GPU resource handles - which lacks mutex or RCU protection during concurrent add/remove operations. The crash trace shows the race path: a page fault during VRAM BAR memory mapping (nouveau_ttm_fault → ttm_bo_vm_fault_reserved → nouveau_ttm_io_mem_reserve → nvif_object_map_handle → nvkm_ioctl → nvkm_object_search). When two threads concurrently manipulate client objects, one thread can dereference a pointer that another thread has concurrently freed or invalidated, producing the observed non-canonical address fault at nvkm_object_search+0x1d. The affected kernel versions span through 6.8-rc6, confirmed by CPE data and the crash report on 6.8.0-rc6+.
RemediationAI
The primary fix is to apply one of the three upstream stable-tree patches available at https://git.kernel.org/stable/c/6887314f5356389fc219b8152e951ac084a10ef7, https://git.kernel.org/stable/c/96c8751844171af4b3898fee3857ee180586f589, or https://git.kernel.org/stable/c/b7cc4ff787a572edf2c55caeffaa88cd801eb135. The fix adds locking to the nvkm client object tree to serialize add/remove operations. Upstream fix is available via kernel stable commits; a specific tagged release version is not independently confirmed from the provided data - verify with your distribution's security tracker (Canonical, Red Hat, SUSE, etc.) for backport status and specific package versions. As a compensating control where patching is not immediately possible, restricting untrusted local users from accessing the GPU device node (/dev/dri/renderD* and /dev/dri/card*) via udev rules or group membership will prevent exploitation, at the cost of disabling GPU access for those users. Alternatively, loading the proprietary nvidia.ko driver in place of nouveau sidesteps this code path entirely, though this is a significant operational change.
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Same weakness CWE-362 – Race Condition
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External POC / Exploit Code
Leaving vuln.today