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CVE-2026-98413

Estado: RecibidaSin puntuar—
Gravedad—Sin puntuar
Probabilidad de explotación0.22 %mayor que el 12 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoNo conocidosin código público localizado

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:

selinux: rellenar siempre la decisión de AVC en avc_has_perm_noaudit()

Se documenta que avc_has_perm_noaudit() devuelve una copia de la decisión de acceso en @avd, pero su retorno anticipado para un conjunto vacío de permisos solicitados deja el búfer sin modificar. Todos los llamadores pasan una variable local no inicializada en la pila y, después, la envían a avc_audit(), y el hook de inodos incluso la almacena en la caché de decisiones por tarea.

Se rellena una decisión de denegar todo y auditar todo, similar a avd_init(), de modo que cada llamador reciba un valor definido sin coste adicional en la ruta crítica.

Traducción automática del texto original de NVD (en inglés).

CVSS

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

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días
0.22 %
Percentil entre todas las CVEs puntuadas
12
Fecha de la puntuación
21/10/2026

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

Mostrar las 8 referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-98413",
  "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": "e6f2f381e4015386a656a369835f949c26000e6b",
              "lessThan": "c781e737aa0de95289b1774d5fd29388895737a9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6f2f381e4015386a656a369835f949c26000e6b",
              "lessThan": "e308c5acfe283a66627fc407065626df4ab753ec",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6f2f381e4015386a656a369835f949c26000e6b",
              "lessThan": "f9da796fa238f8e4414ee8481e6c979759a3d563",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6f2f381e4015386a656a369835f949c26000e6b",
              "lessThan": "e77461af13eab5c9a953cc52ec8432cc941d61e2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6f2f381e4015386a656a369835f949c26000e6b",
              "lessThan": "5a6f9a872b4ff68877caf998bee352153b7154bc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6f2f381e4015386a656a369835f949c26000e6b",
              "lessThan": "24e00850bcff46b984f4c44b92e5499450fcfb5a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6f2f381e4015386a656a369835f949c26000e6b",
              "lessThan": "835133337c2ce200db56f62d018c79087dee2603",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e6f2f381e4015386a656a369835f949c26000e6b",
              "lessThan": "8861db305103107199b1426f25fde1fb6d465583",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "security/selinux/avc.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.1"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.1",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "security/selinux/avc.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-14T14:17:52.547",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/24e00850bcff46b984f4c44b92e5499450fcfb5a",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5a6f9a872b4ff68877caf998bee352153b7154bc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/835133337c2ce200db56f62d018c79087dee2603",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8861db305103107199b1426f25fde1fb6d465583",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c781e737aa0de95289b1774d5fd29388895737a9",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e308c5acfe283a66627fc407065626df4ab753ec",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e77461af13eab5c9a953cc52ec8432cc941d61e2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f9da796fa238f8e4414ee8481e6c979759a3d563",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: always fill AVC decision in avc_has_perm_noaudit()\n\navc_has_perm_noaudit() is documented to return a copy of the access\ndecision in @avd, but its early return for an empty requested permission\nset leaves the buffer untouched.  All callers pass an uninitialized\nstack variable and afterwards feed it to avc_audit(), and the inode hook\neven stores it in the per-task decision cache.\n\nFill in a deny-all, audit-all decision, similar to avd_init(), so every\ncaller receives a defined value at no cost on the hot path."
    }
  ],
  "lastModified": "2026-10-19T10:18:46.557",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}