298 lines
15 KiB
JSON
298 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-80540",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-26T14:34:25.765Z",
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"datePublished": "2026-08-26T14:37:13.966Z",
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"dateUpdated": "2026-10-16T19:26:25.254Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-27T05:01:29.500Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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)"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c"
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"drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c"
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],
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"version": "4.2",
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"status": "affected"
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"version": "0",
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"lessThan": "4.2",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.266",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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},
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{
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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"version": "6.1.184",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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},
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"version": "6.6.153",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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"version": "6.12.105",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.46",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.10",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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"url": "https://git.kernel.org/stable/c/b8bb9ba3f101a1b0011f785a577a4a0a38371174"
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}
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],
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"title": "drm/amdgpu: Fix UVD decode image min size calculation",
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{
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"metrics": [
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{
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-80540",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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"Technical Impact": "total"
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"timestamp": "2026-10-16T19:16:48.122962Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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} |