{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6e164ba1057175fb8a370d8e05cbff5c57eac0c8",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "1474f3970d1afd303e12ff14d06808eabb371576",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "07fe270ec07c138a70afe7a81e115a85c35c545c",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            },
            {
              "lessThan": "fd37f9dd5b5ab70a46fa7bc76623c0528d602b27",
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.105",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.46",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.10",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: reject oversized IBs with per-ring packet limits\n\nOn GFX rings, amdgpu_cs_p2_ib() passed user-supplied ib_bytes through\nto ib-\u003elength_dw without a limit, while ring_emit_ib() encodes length\ninto packet fields. Oversized values can corrupt adjacent control bits\nand destabilize command submission.\n\nAdd a per-ring IB packet size limit helper and reject command\nsubmissions exceeding the corresponding dword limit before IB\nallocation. Use the documented 20-bit limit for GFX/compute/SDMA/VPE,\nand apply the MM fallback limit for other ring types.\n\n(cherry picked from commit 7f48fa2cf62e3fa6c9c3870aa74988f773247e52)"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only through the AMDGPU_CS DRM ioctl on a local /dev/dri/renderD* render node; amdgpu_cs_p2_ib() takes user-supplied ib_bytes from command-submission chunks during local GPU job setup, with no network, adjacent-radio, or physical-access path to this code.\nAC:L - An attacker fully controls ib_bytes, ring selection, and backing BO mappings in each submit; triggering the flaw only requires one crafted IB chunk with length_dw above the hardware 20-bit packet limit (e.g., \u003e0xFFFFF dwords), with no race or victim-dependent timing.\nPR:L - AMDGPU_CS is registered with DRM_AUTH|DRM_RENDER_ALLOW, so any authenticated render-client process with standard local access to /dev/dri/renderD* (typical render/video group on desktops, gaming PCs, and cloud GPU VMs) can reach amdgpu_cs_ioctl() without real root or init-namespace capabilities.\nUI:N - Exploitation is entirely self-contained in the attacker\u0027s own DRM client (open render node, allocate/map buffers, submit CS); no separate victim action such as opening a file, mounting a filesystem, or clicking a link is required.\nS:C - On GFX/compute rings, ring_emit_ib() ORs ib-\u003elength_dw into the INDIRECT_BUFFER control dword alongside VMID and preempt/valid bits; oversized values spill into those fields, so the GPU can execute IBs under an unintended VMID and perform DMA outside the attacker\u0027s GPU virtual address space, crossing per-client GPU/IOMMU isolation (e.g., multi-tenant cloud GPU).\nC:H - Corrupted VMID and adjacent control bits in the INDIRECT_BUFFER packet can redirect GPU fetches/execution into another client\u0027s GPU-mapped memory, providing a cross-context read primitive beyond the attacker\u0027s own BO mappings, not merely a benign driver error return.\nI:H - The same control-dword overflow can alter VALID/PREEMPT/VMID encoding so the GPU performs writes and command execution in an unintended address space, yielding cross-context memory corruption and a plausible path to arbitrary GPU-visible memory modification or further kernel compromise.\nA:H - Oversized IB lengths also destabilize command submission and can hang or reset GFX/SDMA rings (as noted in the fix and related IGT oversize-packet tests), denying GPU/display availability until driver reset or reboot on affected AMD systems."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-27T05:01:58.528Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6e164ba1057175fb8a370d8e05cbff5c57eac0c8"
        },
        {
          "url": "https://git.kernel.org/stable/c/1474f3970d1afd303e12ff14d06808eabb371576"
        },
        {
          "url": "https://git.kernel.org/stable/c/07fe270ec07c138a70afe7a81e115a85c35c545c"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd37f9dd5b5ab70a46fa7bc76623c0528d602b27"
        }
      ],
      "title": "drm/amdgpu: reject oversized IBs with per-ring packet limits",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80576",
    "datePublished": "2026-08-26T14:37:35.538Z",
    "dateReserved": "2026-08-26T14:34:25.768Z",
    "dateUpdated": "2026-08-27T05:01:58.528Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}