{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31566","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-03-09T15:48:24.117Z","datePublished":"2026-04-24T14:35:46.740Z","dateUpdated":"2026-08-05T12:23:32.865Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T12:23:32.865Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Fix fence put before wait in amdgpu_amdkfd_submit_ib\n\namdgpu_amdkfd_submit_ib() submits a GPU job and gets a fence\nfrom amdgpu_ib_schedule(). This fence is used to wait for job\ncompletion.\n\nCurrently, the code drops the fence reference using dma_fence_put()\nbefore calling dma_fence_wait().\n\nIf dma_fence_put() releases the last reference, the fence may be\nfreed before dma_fence_wait() is called. This can lead to a\nuse-after-free.\n\nFix this by waiting on the fence first and releasing the reference\nonly after dma_fence_wait() completes.\n\nFixes the below:\ndrivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c:697 amdgpu_amdkfd_submit_ib() warn: passing freed memory 'f' (line 696)\n\n(cherry picked from commit 8b9e5259adc385b61a6590a13b82ae0ac2bd3482)"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The vulnerable `amdgpu_amdkfd_submit_ib()` path is reached from local userspace through `/dev/kfd` and AMDGPU/KFD queue ioctls, not through network, adjacent, or physical input.\nAC:L - On an affected AMDGPU KFD/NO_HWS Hawaii deployment, an attacker can drive the queue create/destroy path and repeatedly trigger the fence lifetime bug without relying on victim-controlled timing. When uncertain, the lower-complexity option is appropriate.\nPR:L - The path requires local access to the KFD/AMDGPU device interfaces and a render/DRM VM FD, but no kernel administrative capability is checked by the relevant KFD queue ioctls. This is ordinary low-privileged local GPU access rather than real root.\nUI:N - After obtaining local device access, the attacker can issue the ioctl sequence themselves. No separate victim action is required.\nS:U - The impact is within the same kernel security authority: corrupting or crashing kernel/driver state from a local kernel attack surface. It does not cross a VM, IOMMU, or comparable security boundary.\nC:H - The bug is a use-after-free of a `dma_fence`/AMDGPU fence object used by `dma_fence_wait()`. Per kernel scoring guidance, UAF memory corruption can be leveraged for high confidentiality impact.\nI:H - The same UAF exposes kernel object lifetime corruption in a wait path using function pointers, locks, callbacks, and list state. Per guidance, UAF memory corruption is scored as high integrity impact.\nA:H - Even without full exploitation, using a freed fence in `dma_fence_wait()` can cause kernel warnings, crashes, hangs, or panics. A kernel UAF therefore has high availability impact."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c"],"versions":[{"version":"9ae55f030dc523fc4dc6069557e4a887ea815453","lessThan":"bc7760c107dc08ef3e231d72c492e67b0a86848b","status":"affected","versionType":"git"},{"version":"9ae55f030dc523fc4dc6069557e4a887ea815453","lessThan":"e23602eb0779760544314ed3905fa6a89a4e4070","status":"affected","versionType":"git"},{"version":"9ae55f030dc523fc4dc6069557e4a887ea815453","lessThan":"138e42be35ff2ce6572ae744de851ea286cf3c69","status":"affected","versionType":"git"},{"version":"9ae55f030dc523fc4dc6069557e4a887ea815453","lessThan":"39820864eacd886f1a6f817414fb8f9ea3e9a2b4","status":"affected","versionType":"git"},{"version":"9ae55f030dc523fc4dc6069557e4a887ea815453","lessThan":"42d248726a0837640452b71c5a202ca3d35239ec","status":"affected","versionType":"git"},{"version":"9ae55f030dc523fc4dc6069557e4a887ea815453","lessThan":"7150850146ebfa4ca998f653f264b8df6f7f85be","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c"],"versions":[{"version":"6.0","status":"affected"},{"version":"0","lessThan":"6.0","status":"unaffected","versionType":"semver"},{"version":"6.1.168","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.131","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.80","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.21","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.11","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.131"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.80"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.18.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.19.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/bc7760c107dc08ef3e231d72c492e67b0a86848b"},{"url":"https://git.kernel.org/stable/c/e23602eb0779760544314ed3905fa6a89a4e4070"},{"url":"https://git.kernel.org/stable/c/138e42be35ff2ce6572ae744de851ea286cf3c69"},{"url":"https://git.kernel.org/stable/c/39820864eacd886f1a6f817414fb8f9ea3e9a2b4"},{"url":"https://git.kernel.org/stable/c/42d248726a0837640452b71c5a202ca3d35239ec"},{"url":"https://git.kernel.org/stable/c/7150850146ebfa4ca998f653f264b8df6f7f85be"}],"title":"drm/amdgpu: Fix fence put before wait in amdgpu_amdkfd_submit_ib","x_generator":{"engine":"bippy-1.2.0"}}}}