CISA Flags Three Linux Kernel Vulnerabilities Exploited in the Wild
CISA added three actively exploited Linux kernel flaws (CVE-2025-39682, CVE-2026-53266, CVE-2025-39964) to KEV; federal patch deadline September 21, 2026.
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Vulnerability2 · 1 read
CVE-2026-74469
- CVSS 3.1
- 8.8 high
- EPSS
- <1%p39
- Published
- ·
- Modified
Description · NVD
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.
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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