CVE-2026-74469
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk35th percentile - higher than 35% of all known CVEs
Summary
In the Linux kernel, the SCTP module's sctp_assoc_add_peer() function increments the 16-bit transport_count, which can wrap to zero after adding 65,536 unique peers. This can lead to an out-of-bounds write in SCTP diagnostics (sock_diag).
Risk Assessment
An attacker can cause a system crash or potentially exploit the vulnerability for kernel code execution, posing a serious threat.
Recommendation
Apply the kernel patch that rejects a new unique peer when transport_count has reached U16_MAX.
Original NVD description (English source)
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.