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CVE-2026-80890

Estado: RecibidaSin puntuar—

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

sctp: reject stale cookies with mismatched verification tags

sctp_unpack_cookie() skips cookie expiration checks whenever an association already exists. This is broader than the exception in RFC 9260 Section 5.2.4.

For an existing association, Section 5.2.4 permits an expired State Cookie only when both Verification Tags in the cookie match the current association. Otherwise, the packet SHOULD be discarded and a Stale Cookie ERROR MUST be sent.

The broad check lets an expired Action A restart cookie reach sctp_sf_do_dupcook_a(). In a runtime test with the default 60 second cookie lifetime, replaying such a cookie after 65 seconds returned a COOKIE-ACK and restarted the association.

Leer descripción completaMostrar menos

Check cookie expiration unless both Verification Tags match. This preserves the Action D exception for a lost COOKIE ACK while rejecting expired cookies in all other cases.

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-2026-80890",
  "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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "lessThan": "f6e3cc296372accad4ee57405195021231ef4bcb",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "c151daba0ceb1fb068a215b07de89fb1eb5f87bc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "lessThan": "817cffdbdbdf50e1f2b016599d1897de3ca54964",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "lessThan": "61baa5020b0afb41bfd97f8f6ce5e336c4a4546e",
              "versionType": "git"
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            {
              "status": "affected",
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              "lessThan": "c68557a49e960dbcdede22c7a9b488603078b8b4",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "versionType": "git"
            }
          ],
          "programFiles": [
            "net/sctp/sm_make_chunk.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.12",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/sctp/sm_make_chunk.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-04T18:17:57.077",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/35c279113498d19a8734e2aae67b951b9b20f634",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/61baa5020b0afb41bfd97f8f6ce5e336c4a4546e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/817cffdbdbdf50e1f2b016599d1897de3ca54964",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9d8da8e0a9bce4a340af60dd0446bc7eb8d07587",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://git.kernel.org/stable/c/a0d1693923f41d6f49083aa2446686aed09d1d79",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c151daba0ceb1fb068a215b07de89fb1eb5f87bc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c68557a49e960dbcdede22c7a9b488603078b8b4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f6e3cc296372accad4ee57405195021231ef4bcb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: reject stale cookies with mismatched verification tags\n\nsctp_unpack_cookie() skips cookie expiration checks whenever an\nassociation already exists.  This is broader than the exception in\nRFC 9260 Section 5.2.4.\n\nFor an existing association, Section 5.2.4 permits an expired State\nCookie only when both Verification Tags in the cookie match the current\nassociation.  Otherwise, the packet SHOULD be discarded and a Stale\nCookie ERROR MUST be sent.\n\nThe broad check lets an expired Action A restart cookie reach\nsctp_sf_do_dupcook_a().  In a runtime test with the default 60 second\ncookie lifetime, replaying such a cookie after 65 seconds returned a\nCOOKIE-ACK and restarted the association.\n\nCheck cookie expiration unless both Verification Tags match.  This\npreserves the Action D exception for a lost COOKIE ACK while rejecting\nexpired cookies in all other cases."
    }
  ],
  "lastModified": "2026-09-04T18:17:57.077",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}