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CVE-2026-68474

Estado: RecibidaAlta (7.8)—

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

powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()

spufs_mem_mmap_access() computes the local store offset as address - vma->vm_start, but bounds-checks it against vma->vm_end instead of the local store size. On 64-bit, offset is always well below vma->vm_end, so the clamp never fires and len stays unbounded against the LS_SIZE buffer returned by ctx->ops->get_ls().

Reject offsets at or beyond LS_SIZE and clamp len to the remaining space, mirroring the guard already used by spufs_mem_mmap_fault() and spufs_ps_fault().

CVSS

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:L/PR:L permite escalada local; out-of-bounds en buffer LS_SIZE permite lectura y escritura de memoria del kernel.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageNetwork SegmentationExecution PreventionEncrypt Sensitive Information

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-2026-68474",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "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": "a352894d07059649398c4769dc8b645e1a1dad88",
              "lessThan": "aa7aa8ba40c089762d821e3987aaae19e1f5705c",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a352894d07059649398c4769dc8b645e1a1dad88",
              "lessThan": "d479a7711f8ff127946467b910d947bd971b94ed",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a352894d07059649398c4769dc8b645e1a1dad88",
              "lessThan": "9d3569bfdceda69d5ffd5148901e57b69954d9ef",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a352894d07059649398c4769dc8b645e1a1dad88",
              "lessThan": "d97a8f3668949a8a9d1f6202f8c53446f2d89aa7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a352894d07059649398c4769dc8b645e1a1dad88",
              "lessThan": "913feef74354c653f10ecd4631df7618a95c49c2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a352894d07059649398c4769dc8b645e1a1dad88",
              "lessThan": "3c1e92f75e11a11492b8cb901fceeb9f16ae6415",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "4efa313b15925bdd864784865d6585174979294b",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "arch/powerpc/platforms/cell/spufs/file.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.27"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.27",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "arch/powerpc/platforms/cell/spufs/file.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:20:34.937",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/3c1e92f75e11a11492b8cb901fceeb9f16ae6415",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4efa313b15925bdd864784865d6585174979294b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/913feef74354c653f10ecd4631df7618a95c49c2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9d3569bfdceda69d5ffd5148901e57b69954d9ef",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/aa7aa8ba40c089762d821e3987aaae19e1f5705c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d479a7711f8ff127946467b910d947bd971b94ed",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d97a8f3668949a8a9d1f6202f8c53446f2d89aa7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()\n\nspufs_mem_mmap_access() computes the local store offset as\naddress - vma->vm_start, but bounds-checks it against vma->vm_end\ninstead of the local store size. On 64-bit, offset is always well\nbelow vma->vm_end, so the clamp never fires and len stays unbounded\nagainst the LS_SIZE buffer returned by ctx->ops->get_ls().\n\nReject offsets at or beyond LS_SIZE and clamp len to the remaining\nspace, mirroring the guard already used by spufs_mem_mmap_fault() and\nspufs_ps_fault()."
    }
  ],
  "lastModified": "2026-08-17T06:17:56.837",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}