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CVE-2026-89605

Estado: RecibidaAlta (7.8)—

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

ecryptfs: release message context on send failure

ecryptfs_send_message_locked() moves a message context from the free list to the allocated list before sending the request to the userspace daemon.

If ecryptfs_send_miscdev() fails, the context is left on the allocated list and cannot be reused. Move it back to the free list on failure and clear the caller's pointer.

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 sin UI indica escalada de privilegios local. La fuga de contexto de mensajes en ecryptfs causa DoS (agotamiento de recursos) y potencial corrupción de datos 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 ProgramFilter Network TrafficExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

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-2026-89605",
  "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": "f66e883eb6186bc43a79581b67aff7d1a69d0ff1",
              "lessThan": "177e0c32fec3602bb3b64139bb8bb610cd6722c7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f66e883eb6186bc43a79581b67aff7d1a69d0ff1",
              "lessThan": "743e7aeb9575c0838d8996d40d81a6b8fa5cd060",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f66e883eb6186bc43a79581b67aff7d1a69d0ff1",
              "lessThan": "590fc6140e29c54d2f7839eb9df78d106ee1905e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f66e883eb6186bc43a79581b67aff7d1a69d0ff1",
              "lessThan": "30845ed227475a11a49ccce047837d016b7e0f49",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "47ce611cb13f0eefa550d5434c1afcd4217bfc3e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f66e883eb6186bc43a79581b67aff7d1a69d0ff1",
              "lessThan": "9319706316a8e79f374627554386d575a84b637f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f66e883eb6186bc43a79581b67aff7d1a69d0ff1",
              "lessThan": "654b7e79443f5ea90849f5c1cf70c0d94bd5b10e",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "219644a3ad5518217b2d62cad6d2c36a2308c949",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/ecryptfs/messaging.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.26"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.26",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.109",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.50",
              "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/ecryptfs/messaging.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-11T20:19:45.487",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/177e0c32fec3602bb3b64139bb8bb610cd6722c7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/219644a3ad5518217b2d62cad6d2c36a2308c949",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/30845ed227475a11a49ccce047837d016b7e0f49",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/47ce611cb13f0eefa550d5434c1afcd4217bfc3e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/590fc6140e29c54d2f7839eb9df78d106ee1905e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/654b7e79443f5ea90849f5c1cf70c0d94bd5b10e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/743e7aeb9575c0838d8996d40d81a6b8fa5cd060",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9319706316a8e79f374627554386d575a84b637f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\necryptfs: release message context on send failure\n\necryptfs_send_message_locked() moves a message context from the free\nlist to the allocated list before sending the request to the userspace\ndaemon.\n\nIf ecryptfs_send_miscdev() fails, the context is left on the\nallocated list and cannot be reused. Move it back to the free list on\nfailure and clear the caller's pointer."
    }
  ],
  "lastModified": "2026-09-14T13:19:14.590",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}