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CVE-2026-72242

Estado: RecibidaAlta (7.5)—

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

selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()

selinux_sctp_bind_connect() dereferences sk->sk_socket to pass a struct socket * to selinux_socket_bind() and selinux_socket_connect_helper(). However, when the hook is invoked from the ASCONF softirq path (sctp_process_asconf), there is no file reference guaranteeing that sk->sk_socket is non-NULL. The setsockopt callers (bindx, connectx, set_primary, sendmsg connect) hold a file reference and are not affected.

Both selinux_socket_bind() and selinux_socket_connect_helper() immediately resolve sock->sk, never using the struct socket * for anything else.

Leer descripción completaMostrar menos

Refactor the inner logic into helpers that take a struct sock * directly so that selinux_sctp_bind_connect() never needs to touch sk->sk_socket at all.

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.

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

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-2026-72242",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "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": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
              "lessThan": "e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
              "lessThan": "2fcaf133a8fd88b69f32ebaecad93fd302da828f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
              "lessThan": "a4bc2fb8536488b37680c0b66c59434a4b7f8c2f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
              "lessThan": "5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
              "lessThan": "cc8bd47b35eca82393cbad08b1cc86f02e034439",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
              "lessThan": "d61a80b17254be7230bc5544f8e62ddf21ab38e2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
              "lessThan": "37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
              "lessThan": "56acfeb10019e200ab6787d01f8d7cbe0f01526f",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "security/selinux/hooks.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.266",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.217",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.148",
              "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": [
            "security/selinux/hooks.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:51.317",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2fcaf133a8fd88b69f32ebaecad93fd302da828f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/56acfeb10019e200ab6787d01f8d7cbe0f01526f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a4bc2fb8536488b37680c0b66c59434a4b7f8c2f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cc8bd47b35eca82393cbad08b1cc86f02e034439",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d61a80b17254be7230bc5544f8e62ddf21ab38e2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: avoid sk_socket dereference in selinux_sctp_bind_connect()\n\nselinux_sctp_bind_connect() dereferences sk->sk_socket to pass a\nstruct socket * to selinux_socket_bind() and\nselinux_socket_connect_helper().  However, when the hook is invoked\nfrom the ASCONF softirq path (sctp_process_asconf), there is no file\nreference guaranteeing that sk->sk_socket is non-NULL.  The setsockopt\ncallers (bindx, connectx, set_primary, sendmsg connect) hold a file\nreference and are not affected.\n\nBoth selinux_socket_bind() and selinux_socket_connect_helper()\nimmediately resolve sock->sk, never using the struct socket * for\nanything else.  Refactor the inner logic into helpers that take a\nstruct sock * directly so that selinux_sctp_bind_connect() never needs\nto touch sk->sk_socket at all."
    }
  ],
  "lastModified": "2026-08-23T13:16:42.200",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}