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CVE-2026-80539

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: disallow multiple FENCE chunks in one submit

amdgpu_cs_pass1() dispatches on chunk_id once per chunk without rejecting repeated ids. p->uf_bo is a single-slot field, so a submission carrying two AMDGPU_CHUNK_ID_FENCE chunks runs amdgpu_cs_p1_user_fence() twice, and the second run overwrites p->uf_bo with a freshly referenced BO without dropping the reference taken by the first.

amdgpu_cs_parser_fini() only unrefs the final p->uf_bo, so every FENCE chunk but the last leaks a BO reference. The leaked BO outlives handle close and process exit.

Leer descripción completaMostrar menos

Reject duplicate FENCE chunks the same way commit fec5f8e8c6bc ("drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit") did for p->bo_list.

(cherry picked from commit 665b1fc2a1845206408f9a2c6da67101789edb82)

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-80539",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "lessThan": "7e9954e7212042ec808b06181b365b14f00c6f0a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "lessThan": "070229262ede37d17c4ea596650deb6e5eb5d106",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "lessThan": "5f46322e0b84af29e10eb951ff45bd6ea40640de",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "lessThan": "71aa45f7bfe46fbc6f51e7832573ff49b6005fea",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "lessThan": "e3ee74d6dbbe409eb99546a7b0a02b2782f9021d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d38ceaf99ed015f2a0b9af3499791bd3a3daae21",
              "lessThan": "931cd1d1baeae68e8eb2c23bc1f3d8934dca6241",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.2",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.153",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-26T15:17:08.133",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/070229262ede37d17c4ea596650deb6e5eb5d106",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5f46322e0b84af29e10eb951ff45bd6ea40640de",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/71aa45f7bfe46fbc6f51e7832573ff49b6005fea",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7e9954e7212042ec808b06181b365b14f00c6f0a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/931cd1d1baeae68e8eb2c23bc1f3d8934dca6241",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e3ee74d6dbbe409eb99546a7b0a02b2782f9021d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: disallow multiple FENCE chunks in one submit\n\namdgpu_cs_pass1() dispatches on chunk_id once per chunk without\nrejecting repeated ids. p->uf_bo is a single-slot field, so a\nsubmission carrying two AMDGPU_CHUNK_ID_FENCE chunks runs\namdgpu_cs_p1_user_fence() twice, and the second run overwrites\np->uf_bo with a freshly referenced BO without dropping the reference\ntaken by the first.\n\namdgpu_cs_parser_fini() only unrefs the final p->uf_bo, so every FENCE\nchunk but the last leaks a BO reference. The leaked BO outlives handle\nclose and process exit.\n\nReject duplicate FENCE chunks the same way commit fec5f8e8c6bc\n(\"drm/amdgpu: disallow multiple BO_HANDLES chunks in one submit\") did\nfor p->bo_list.\n\n(cherry picked from commit 665b1fc2a1845206408f9a2c6da67101789edb82)"
    }
  ],
  "lastModified": "2026-08-27T13:18:39.113",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}