CVE-2026-74469 (GCVE-0-2026-74469)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:37
VLAI
Title
sctp: prevent peer transport count overflow
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: prevent peer transport count overflow sctp_assoc_add_peer() increments the association's 16-bit transport_count for every new unique peer. Adding the 65,536th transport wraps the count to zero. SCTP sock_diag uses transport_count to reserve the INET_DIAG_PEERS payload, then copies one sockaddr_storage for every entry in transport_addr_list. After the wrap, a diagnostic dump reserves an empty payload and writes 8 MiB of peer addresses past the skb tail. Reject a new unique peer when transport_count has reached U16_MAX. Perform the check after the existing-peer lookup so a duplicate address continues to return its existing transport at the limit.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8f840e47f190cbe61a96945c13e9551048d42cef , < b453e00da1211e997b82743d28af7714c59c05c8 (git)
Affected: 8f840e47f190cbe61a96945c13e9551048d42cef , < dfea32dd76f390e3155177b0038cc47b01386198 (git)
Affected: 8f840e47f190cbe61a96945c13e9551048d42cef , < 80f48523a0fe42db2e7375dff4e38a25c117090a (git)
Affected: 8f840e47f190cbe61a96945c13e9551048d42cef , < 546221b86ceeba0d8fec92d46a0604bb7b62be07 (git)
Affected: 8f840e47f190cbe61a96945c13e9551048d42cef , < 09e722030e8148ba4ed1e42c6b2ea57bda9f9895 (git)
Affected: 8f840e47f190cbe61a96945c13e9551048d42cef , < 4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0 (git)
Affected: 8f840e47f190cbe61a96945c13e9551048d42cef , < 6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75 (git)
Affected: 8f840e47f190cbe61a96945c13e9551048d42cef , < bd0e9289e2642f6a5c54faad304ce0f41e926d22 (git)
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Linux Linux Affected: 4.7
Unaffected: 0 , < 4.7 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: prevent peer transport count overflow\n\nsctp_assoc_add_peer() increments the association\u0027s 16-bit transport_count\nfor every new unique peer. Adding the 65,536th transport wraps the count to\nzero.\n\nSCTP sock_diag uses transport_count to reserve the INET_DIAG_PEERS payload,\nthen copies one sockaddr_storage for every entry in transport_addr_list.\nAfter the wrap, a diagnostic dump reserves an empty payload and writes\n8 MiB of peer addresses past the skb tail.\n\nReject a new unique peer when transport_count has reached U16_MAX. Perform\nthe check after the existing-peer lookup so a duplicate address continues\nto return its existing transport at the limit."
        }
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      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74469.json",
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    "redhat_vex": {
      "current_release_date": "2026-08-19T18:25:39+00:00",
      "cve": "CVE-2026-74469",
      "id": "CVE-2026-74469",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: sctp: prevent peer transport count overflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74469.json",
      "version": "3"
    }
  }
}



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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.

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  • 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.
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  • 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.