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CVE-2026-89693

Estado: RecibidaSin puntuar—

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

nfsd: check nfsd4_acl_to_attr() return value in nfsd4_create()

nfsd4_create() stores the return value of nfsd4_acl_to_attr() in status, but the switch(create->cr_type) block unconditionally overwrites it in every branch. ACL translation errors are silently discarded, and the CREATE proceeds without the requested ACL.

Add an early exit check after nfsd4_acl_to_attr(), matching the pattern already used in nfsd4_setattr().

[ cel: prefer NFS4ERR_BADTYPE over NFS4ERR_ATTRNOTSUPP ]

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-2026-89693",
  "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": "c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b",
              "lessThan": "26877d3a09afb3838a053867a655ca30c46a1f81",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b",
              "lessThan": "430ed49a16cf9ca249d0fb51490582090bc4848b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b",
              "lessThan": "80cebb0e8a8d1e758f0d671f5e047279c5c3e528",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c0cbe70742f4a70893cd6e5f6b10b6e89b6db95b",
              "lessThan": "2c7912732184773dbd371a411da87af1cc080b86",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c5409ce523af40d5c3019717bc5b4f72038d48be",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d52acd23a327cada5fb597591267cfc09f08bb1d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.10.220",
              "lessThan": "5.11",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.15.154",
              "lessThan": "5.16",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "fs/nfsd/nfs4proc.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/nfsd/nfs4proc.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-11T20:19:56.380",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/26877d3a09afb3838a053867a655ca30c46a1f81",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2c7912732184773dbd371a411da87af1cc080b86",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/430ed49a16cf9ca249d0fb51490582090bc4848b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/80cebb0e8a8d1e758f0d671f5e047279c5c3e528",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: check nfsd4_acl_to_attr() return value in nfsd4_create()\n\nnfsd4_create() stores the return value of nfsd4_acl_to_attr() in\nstatus, but the switch(create->cr_type) block unconditionally\noverwrites it in every branch. ACL translation errors are silently\ndiscarded, and the CREATE proceeds without the requested ACL.\n\nAdd an early exit check after nfsd4_acl_to_attr(), matching the\npattern already used in nfsd4_setattr().\n\n[ cel: prefer NFS4ERR_BADTYPE over NFS4ERR_ATTRNOTSUPP ]"
    }
  ],
  "lastModified": "2026-09-21T14:17:25.340",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}