268 lines
14 KiB
JSON
268 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveId": "CVE-2026-68108",
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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": "2026-07-30T09:28:09.368Z",
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"datePublished": "2026-08-10T11:58:25.241Z",
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"dateUpdated": "2026-10-19T20:58:51.134Z"
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},
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"shortName": "Linux",
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},
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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/vce: fix integer overflow in image size\n\nFix a security vulnerability where malicious VCE command streams\nwith oversized dimensions (e.g. 65536×65536) cause 32-bit integer\noverflow, wrapping the calculated buffer size to 0. This bypasses\nvalidation and allows GPU firmware to perform out-of-bound memory\naccess.\n\nThe fix uses 64-bit arithmetic to detect overflow and rejects\ninvalid dimensions before they reach the hardware.\n\nV2: remove redundant check\nV3: modify max height value\nV4: remove size64\n\n(cherry picked from commit cbe408dba581755ad1279a487ec786d8927d778d)"
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}
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{
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"baseScore": 8.8,
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},
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{
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"lang": "en",
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"value": "AV:L - The flaw is reached only through the AMDGPU_CS DRM ioctl on a local render node (/dev/dri/renderD*); there is no network, adjacent-radio, or physical-device path to the VCE command-stream parser.\nAC:L - On affected AMD GPUs using physical-mode VCE parsing, an attacker fully controls the IB and can set create-command dimensions (e.g., 65536x65536) to deterministically overflow the 32-bit size to zero without races or uncontrollable layout conditions.\nPR:L - Exploitation requires only unprivileged local access to the amdgpu DRM render node; AMDGPU_CS is gated by DRM_AUTH|DRM_RENDER_ALLOW with no root, DRM-master, or non-namespace capability requirement.\nUI:N - No victim interaction is needed beyond the attacker submitting crafted VCE command buffers through their own render-node context; no third party must open files or take other actions.\nS:C - Bypassing size-based BO relocation/validation lets VCE firmware DMA outside the intended buffer boundaries, crossing the GPU memory-isolation boundary that kernel validation is meant to enforce on GART/VRAM mappings.\nC:H - With validation defeated, VCE firmware can read arbitrarily beyond undersized encode/context/MV buffers, exposing other GPU-accessible memory including GTT-mapped system memory and adjacent VRAM allocations.\nI:H - The same out-of-bounds VCE firmware accesses enable arbitrary writes to GPU-mapped memory beyond validated buffers, providing memory-corruption primitives suitable for privilege escalation or control-flow influence.\nA:H - Oversized VCE operations against undersized buffers can trigger GPU page faults, engine hangs, GPU resets, or broader system disruption that the attacker can repeat via further command submissions."
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}
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c"
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"version": "0",
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"lessThanOrEqual": "6.6.*",
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},
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{
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"lessThanOrEqual": "6.12.*",
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},
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"title": "drm/amdgpu/vce: fix integer overflow in image size",
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"description": "CWE-190 Integer Overflow or Wraparound"
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}
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"title": "CISA ADP Vulnrichment",
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} |