High 8.8Published Aug 15, 2026

CVE-2026-74469sctp: prevent peer transport count overflow

Updated under an hour ago (Oct 27, 2026, 10:40 AM ET)

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 8f840e47f190cbe61a96945c13e9551048d42cef before b453e00da1211e997b82743d28af7714c59c05c8; from 8f840e47f190cbe61a96945c13e9551048d42cef before dfea32dd76f390e3155177b0038cc47b01386198; from 8f840e47f190cbe61a96945c13e9551048d42cef before 80f48523a0fe42db2e7375dff4e38a25c117090a; from 8f840e47f190cbe61a96945c13e9551048d42cef before 546221b86ceeba0d8fec92d46a0604bb7b62be07; from 8f840e47f190cbe61a96945c13e9551048d42cef before 09e722030e8148ba4ed1e42c6b2ea57bda9f9895; 8f840e47f190cbe61a96945c13e9551048d42cef builds before 4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0; from 8f840e47f190cbe61a96945c13e9551048d42cef before 6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75; from 8f840e47f190cbe61a96945c13e9551048d42cef before bd0e9289e2642f6a5c54faad304ce0f41e926d22	CNA record

References

References

https://git.kernel.org/stable/c/b453e00da1211e997b82743d28af7714c59c05c8
https://git.kernel.org/stable/c/dfea32dd76f390e3155177b0038cc47b01386198
https://git.kernel.org/stable/c/80f48523a0fe42db2e7375dff4e38a25c117090a
https://git.kernel.org/stable/c/546221b86ceeba0d8fec92d46a0604bb7b62be07
https://git.kernel.org/stable/c/09e722030e8148ba4ed1e42c6b2ea57bda9f9895
https://git.kernel.org/stable/c/4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0
https://git.kernel.org/stable/c/6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75
https://git.kernel.org/stable/c/bd0e9289e2642f6a5c54faad304ce0f41e926d22

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.