{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80540","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-26T14:34:25.765Z","datePublished":"2026-08-26T14:37:13.966Z","dateUpdated":"2026-08-27T05:01:29.500Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-27T05:01:29.500Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Fix UVD decode image min size calculation\n\nThis needs to use pitch instead of width. Also reject pitch\nover 4096 to avoid overflow.\n\n(cherry picked from commit b41c8cb12e202b220353332ab87dc01a11f69304)"}],"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 - Reachable only via AMDGPU_CS ioctl on a local DRM render node (/dev/dri/renderD*), through amdgpu_cs_ioctl → amdgpu_cs_patch_ibs → amdgpu_uvd_ring_parse_cs → amdgpu_uvd_cs_pass2 → amdgpu_uvd_cs_msg → amdgpu_uvd_cs_msg_decode; not reachable from any network-facing kernel service.\nAC:L - An attacker with render-node access fully controls UVD decode message fields (width, height, pitch in msg[28], stream_type) in their own BO and can reliably set pitch > width (only width > pitch was rejected) to force an underestimated buf_sizes[0x2] check.\nPR:L - Exploitation requires only standard unprivileged local access to the AMDGPU DRM render node (DRM_AUTH|DRM_RENDER_ALLOW on AMDGPU_CS ioctl), not real root; user namespaces alone do not grant render-node access.\nUI:N - No victim interaction is required; a local attacker can directly craft and submit a UVD command stream with a decode message via AMDGPU_CS ioctl after creating a valid UVD session handle.\nS:U - Impact is confined to the kernel/GPU driver on the local host (GPU out-of-bounds access within the attacker's DRM client address space); it does not cross VM, IOMMU, or sandbox boundaries to a different security authority.\nC:H - Underestimating the decode image minimum size lets undersized buffers pass amdgpu_uvd_cs_pass2 validation while the UVD engine decodes using pitch stride, enabling out-of-bounds reads of adjacent GPU-mapped memory that may contain sensitive data.\nI:H - Using image_size (width-based) instead of (pitch*height)*3/2 for buf_sizes[0x2] allows the UVD hardware to perform large out-of-bounds writes past the validated buffer when pitch exceeds width, corrupting adjacent GPU-mapped memory.\nA:H - Large GPU out-of-bounds writes from the UVD decode engine can hang or reset the GPU driver and may trigger kernel oops/panic; unbounded pitch before the fix also risked integer overflow wrapping the minimum size to near-zero, amplifying corruption."}]}],"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_uvd.c"],"versions":[{"version":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21","lessThan":"bc7397a033ac52f6d8c9bb6510d61694b2a3fce7","status":"affected","versionType":"git"},{"version":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21","lessThan":"d058f7a6709441afe1784eecd8c0643dd84750bc","status":"affected","versionType":"git"},{"version":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21","lessThan":"b7549e3f96c78921751c4b3e69af729662130d83","status":"affected","versionType":"git"},{"version":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21","lessThan":"60539d517e8439621532d8c01091ac049c596b4b","status":"affected","versionType":"git"},{"version":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21","lessThan":"271a7da84a6262a09de549912dcf6a749d169cb6","status":"affected","versionType":"git"},{"version":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21","lessThan":"25ee120f3803ad9e416ef9f76f4c3234cc4d645b","status":"affected","versionType":"git"},{"version":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21","lessThan":"5cbd8af02b0b9c8723fa30edcf6fccab5170af8d","status":"affected","versionType":"git"},{"version":"d38ceaf99ed015f2a0b9af3499791bd3a3daae21","lessThan":"b8bb9ba3f101a1b0011f785a577a4a0a38371174","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_uvd.c"],"versions":[{"version":"4.2","status":"affected"},{"version":"0","lessThan":"4.2","status":"unaffected","versionType":"semver"},{"version":"5.10.266","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.217","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.184","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.153","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.105","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.46","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.10","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","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":"4.2","versionEndExcluding":"5.10.266"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.217"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.1.184"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.6.153"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.12.105"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.18.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.1.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/bc7397a033ac52f6d8c9bb6510d61694b2a3fce7"},{"url":"https://git.kernel.org/stable/c/d058f7a6709441afe1784eecd8c0643dd84750bc"},{"url":"https://git.kernel.org/stable/c/b7549e3f96c78921751c4b3e69af729662130d83"},{"url":"https://git.kernel.org/stable/c/60539d517e8439621532d8c01091ac049c596b4b"},{"url":"https://git.kernel.org/stable/c/271a7da84a6262a09de549912dcf6a749d169cb6"},{"url":"https://git.kernel.org/stable/c/25ee120f3803ad9e416ef9f76f4c3234cc4d645b"},{"url":"https://git.kernel.org/stable/c/5cbd8af02b0b9c8723fa30edcf6fccab5170af8d"},{"url":"https://git.kernel.org/stable/c/b8bb9ba3f101a1b0011f785a577a4a0a38371174"}],"title":"drm/amdgpu: Fix UVD decode image min size calculation","x_generator":{"engine":"bippy-1.2.0"}}}}