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CVE-2026-74469

HIGHCVSS 8.8/10EPSS 0.41%

Last modified

CVE-2026-74469 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.41%

34.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 8f840e47f190cbe61a96945c13e9551048d42cef, < b453e00da1211e997b82743d28af7714c59c05c8; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < dfea32dd76f390e3155177b0038cc47b01386198; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 80f48523a0fe42db2e7375dff4e38a25c117090a; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 546221b86ceeba0d8fec92d46a0604bb7b62be07; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 09e722030e8148ba4ed1e42c6b2ea57bda9f9895; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < bd0e9289e2642f6a5c54faad304ce0f41e926d22
LinuxLinux4.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74469?
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.
How severe is CVE-2026-74469?
CVE-2026-74469 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74469?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST