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/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 8f840e47f190cbe61a96945c13e9551048d42cef, < b453e00da1211e997b82743d28af7714c59c05c8; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < dfea32dd76f390e3155177b0038cc47b01386198; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 80f48523a0fe42db2e7375dff4e38a25c117090a; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 546221b86ceeba0d8fec92d46a0604bb7b62be07; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 09e722030e8148ba4ed1e42c6b2ea57bda9f9895; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < 6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75; >= 8f840e47f190cbe61a96945c13e9551048d42cef, < bd0e9289e2642f6a5c54faad304ce0f41e926d22 |
| Linux | Linux | 4.7 |
References
- https://git.kernel.org/stable/c/09e722030e8148ba4ed1e42c6b2ea57bda9f9895
- https://git.kernel.org/stable/c/4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0
- https://git.kernel.org/stable/c/546221b86ceeba0d8fec92d46a0604bb7b62be07
- https://git.kernel.org/stable/c/6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75
- https://git.kernel.org/stable/c/80f48523a0fe42db2e7375dff4e38a25c117090a
- https://git.kernel.org/stable/c/b453e00da1211e997b82743d28af7714c59c05c8
- https://git.kernel.org/stable/c/bd0e9289e2642f6a5c54faad304ce0f41e926d22
- https://git.kernel.org/stable/c/dfea32dd76f390e3155177b0038cc47b01386198
Timeline
- Published
- Aug 15, 2026
- Last modified
- Oct 16, 2026
- NVD status
- Received