{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68106", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.368Z", "datePublished": "2026-08-10T11:58:23.108Z", "dateUpdated": "2026-08-19T16:29:19.954Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:29:19.954Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix division by zero with invalid uvd dimensions\n\nWhen width or height is less than 16, width_in_mb or height_in_mb\nbecomes 0, leading to fs_in_mb being 0. This causes a division by\nzero when calculating num_dpb_buffer in H264 and H264 Perf decode\npaths.\n\nAdd validation to reject frames with width < 16 or height < 16\nbefore performing any calculations that depend on these values.\n\nV2: Format change - move up all vaiable definitions.\nV3: Use warn_once to avoid spam.\n\n(cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)" } ], "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 flaw is reached only via the AMDGPU_CS DRM ioctl on a local render node (/dev/dri/renderD*), traversing amdgpu_cs_ioctl, amdgpu_cs_patch_ibs, amdgpu_uvd_ring_parse_cs, and amdgpu_uvd_cs_msg_decode; it is not reachable from any network-facing kernel service.\nAC:L - An attacker with render-node access fully controls the UVD decode message fields (stream_type H264/H264 Perf, width, height, level) in their own BO and can reliably trigger width or height < 16 after creating a valid UVD session handle.\nPR:L - Exploitation requires only standard unprivileged local access to the AMDGPU DRM render node (DRM_AUTH|DRM_RENDER_ALLOW on AMDGPU_CS), not root or capabilities outside the render/video group; user namespaces do not grant this access by themselves.\nUI:N - No victim interaction is required; a local attacker can directly submit a crafted UVD command stream through AMDGPU_CS ioctl without needing another user to open media, mount a filesystem, or take any other action.\nS:U - Impact is confined to the kernel/GPU driver security domain on the local host (kernel oops or GPU memory corruption within the attacker's DRM client); it does not cross VM, IOMMU, or sandbox boundaries to affect a different security authority.\nC:H - On x86, kernel-mode divide-by-zero causes a fatal trap; on architectures where unsigned division by zero returns zero, underestimated DPB buffer sizes can pass validation, enabling GPU out-of-bounds reads of adjacent mapped buffers that may hold sensitive data.\nI:H - Underestimated buffer-size calculations from zero macroblock counts can let undersized DPB buffers pass kernel validation, permitting the UVD engine to perform out-of-bounds writes into adjacent GPU-mapped memory that could be leveraged for further memory corruption.\nA:H - Triggering the divide-by-zero in kernel context during CS parsing causes an x86 divide-error exception leading to die()/kernel oops, crashing or hanging the system; repeated submissions can deny GPU/video availability on affected UVD hardware (v3.1-v6.0)." } ] } ], "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": "004d0453cfef16f056cb7b8bc04f69f19cf9df32", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "00ee64910ecf748cc15b23bbcbea472c203ec1e8", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "81c9b4921f62d1642b9d775524ae9240e521a5ed", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "52f9a588296432accf2982f7d258192a37562f4f", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "ffb33d466a68cea3e8a3dbed04d79037a3cbabd1", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc", "status": "affected", "versionType": "git" }, { "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21", "lessThan": "0c01c811be47e6b146552dd59bfedbea8f09b8f4", "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": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.6", "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": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.6.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.12.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "6.18.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.1.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/004d0453cfef16f056cb7b8bc04f69f19cf9df32" }, { "url": "https://git.kernel.org/stable/c/00ee64910ecf748cc15b23bbcbea472c203ec1e8" }, { "url": "https://git.kernel.org/stable/c/81c9b4921f62d1642b9d775524ae9240e521a5ed" }, { "url": "https://git.kernel.org/stable/c/52f9a588296432accf2982f7d258192a37562f4f" }, { "url": "https://git.kernel.org/stable/c/a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf" }, { "url": "https://git.kernel.org/stable/c/ffb33d466a68cea3e8a3dbed04d79037a3cbabd1" }, { "url": "https://git.kernel.org/stable/c/be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc" }, { "url": "https://git.kernel.org/stable/c/0c01c811be47e6b146552dd59bfedbea8f09b8f4" } ], "title": "drm/amdgpu: fix division by zero with invalid uvd dimensions", "x_generator": { "engine": "bippy-1.2.0" } } } }