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CVE-2026-74287 (GCVE-0-2026-74287)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:45
VLAI
Title
sctp: validate embedded address parameter length
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: validate embedded address parameter length sctp_verify_asconf() and sctp_verify_param() only validate ADD_IP, DEL_IP, and SET_PRIMARY parameters against a fixed minimum size of sizeof(struct sctp_addip_param) + sizeof(struct sctp_paramhdr). This ensures the outer parameter is large enough to contain an embedded address parameter header, but does not verify that the embedded address parameter's declared length fits within the bounds of the outer parameter. Later, sctp_process_param() and sctp_process_asconf_param() extract the embedded address parameter and pass it to af->from_addr_param(), which uses the address parameter length to parse the variable-length address payload. A malformed peer can therefore advertise an embedded address parameter length that exceeds the remaining bytes in the enclosing parameter. Validate that addr_param->p.length does not exceed the space available after the sctp_addip_param header before processing the embedded address parameter. Reject malformed parameters when the embedded address length extends beyond the enclosing parameter bounds. This prevents out-of-bounds reads when parsing malformed parameters carried in INIT or ASCONF processing paths.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 06c8bf48505f2fef265931db82d5003d302a347b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 28ba1d3c956604a89168adfb4c97cfc6c509bba5 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3a44b2602d57e11e2eb85958d4cd500d14a27d9e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 85f54cf589163a75fa06e37d8c2a4a72824c6dd1 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 92e4adfee56f32a963ebb105c6cd9a1ed707262a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ed8605c6f39b9b84f9a4631db6deb25e7f1e973c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 0c674b20c9cdb54f8a46c88b4d00cadf82b8f0c0 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e9361d0ca55c4af12aac09e2572852fa91046229 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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This ensures the outer\\nparameter is large enough to contain an embedded address parameter header,\\nbut does not verify that the embedded address parameter\u0027s declared length\\nfits within the bounds of the outer parameter.\\n\\nLater, sctp_process_param() and sctp_process_asconf_param() extract the\\nembedded address parameter and pass it to af-\u003efrom_addr_param(), which uses\\nthe address parameter length to parse the variable-length address payload.\\nA malformed peer can therefore advertise an embedded address parameter\\nlength that exceeds the remaining bytes in the enclosing parameter.\\n\\nValidate that addr_param-\u003ep.length does not exceed the space available\\nafter the sctp_addip_param header before processing the embedded address\\nparameter. 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    "redhat_vex": {
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      "cve": "CVE-2026-74287",
      "id": "CVE-2026-74287",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: sctp: validate embedded address parameter length",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74287.json",
      "version": "3"
    },
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      "cve": "CVE-2026-74287",
      "id": "CVE-2026-74287",
      "initial_release_date": "2026-08-28T16:40:06Z",
      "product_status:known_affected": "50",
      "product_status:known_not_affected": "312",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74287",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74287.json",
      "version": "2"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.