CVE-2025-24934: Freebsd

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Software which sets SO_REUSEPORT_LB on a socket and then connects it to a host will not directly observe any problems. However, due to its membership in a load-balancing group, that socket will receive packets originating from any host. This breaks the contract of the connect(2) and implied connect via sendto(2), and may leave the application vulnerable to spoofing attacks. The kernel failed to check the connection state of sockets when adding them to load-balancing groups. Furthermore, when looking up the destination socket for an incoming packet, the kernel will match a socket belonging to a load-balancing group even if it is connected, in violation of the contract that connected sockets are only supposed to receive packets originating from the connected host.

Affected products

• Freebsd Freebsd: from 15.0-BETA2, before p1 (fixed in p1); from 14.3-RELEASE, before p5 (fixed in p5); from 13.5-RELEASE, before p6 (fixed in p6)

Published 2025-10-22. Last modified 2026-06-17.