« Volver al listado

CVE-2026-92489

Estado: RecibidaCrítica (9.8)—

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

xfrm: Fix skb double-free in xfrm_dev_direct_output()

A return value other than 1 from local_out() means that the skb has been consumed or its ownership was transferred. xfrm_dev_direct_output() nevertheless frees the skb on this path, causing a double-free when netfilter drops the packet and invalidating any other owner.

Return the local_out() result directly, matching the ownership handling in xfrm_output_resume().

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.

Vulnerabilidad en kernel Linux (AV:N, sin autenticación) que causa double-free en xfrm_dev_direct_output(), permitiendo DoS por corrupción de memoria y posible RCE remota sin privilegios previos.

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

Privileged Account ManagementFilter Network TrafficApplication Isolation and SandboxingVulnerability ScanningNetwork SegmentationLimit Access to Resource Over Network

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)

Mostrar
{
  "id": "CVE-2026-92489",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "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": "bfb9b9404a53a72524ce695551755117e9d3deb0",
              "lessThan": "621871b696b108026bf4b44ed4085ffa2102f417",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a0395e96831adee8ffa016bf958e4dce9ece656e",
              "lessThan": "bc9297796bfdcc8d9609236e54519a4f38737aac",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5eddd76ec2fd1988f0a3450fde9730b10dd22992",
              "lessThan": "02deb637e965950148752a304dd1471212dd6470",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5eddd76ec2fd1988f0a3450fde9730b10dd22992",
              "lessThan": "56a347950e661c1a7f8f31c43a2ea53c2323b6f4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5eddd76ec2fd1988f0a3450fde9730b10dd22992",
              "lessThan": "2aed51fc58d9ce450e2c116efb956160fd06fa02",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d1d673a5bede3767252cff19c0ab1e5387c6f43f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6.6.85",
              "lessThan": "6.6.157",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.12.21",
              "lessThan": "6.12.110",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.13.9",
              "lessThan": "6.14",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "net/xfrm/xfrm_output.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.14"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.14",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/xfrm/xfrm_output.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:51.007",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/02deb637e965950148752a304dd1471212dd6470",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2aed51fc58d9ce450e2c116efb956160fd06fa02",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/56a347950e661c1a7f8f31c43a2ea53c2323b6f4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/621871b696b108026bf4b44ed4085ffa2102f417",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/bc9297796bfdcc8d9609236e54519a4f38737aac",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: Fix skb double-free in xfrm_dev_direct_output()\n\nA return value other than 1 from local_out() means that the skb has been\nconsumed or its ownership was transferred. xfrm_dev_direct_output()\nnevertheless frees the skb on this path, causing a double-free when\nnetfilter drops the packet and invalidating any other owner.\n\nReturn the local_out() result directly, matching the ownership handling\nin xfrm_output_resume()."
    }
  ],
  "lastModified": "2026-09-18T18:18:13.037",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}