CVE-2026-43916: Identd-NG Pam Authnft

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

pam_authnft is a PAM session module binding nftables firewall rules to authenticated sessions via cgroupv2 inodes. Prior to 0.2.0-alpha, a heap buffer over-read in peer_lookup_tcp (src/peer_lookup.c:134, prior to the fix) allowed a crafted NETLINK_SOCK_DIAG reply to slip past the message-size check, then dereference past the end of the allocation. This vulnerability is fixed in 0.2.0-alpha.

Affected products

• Identd-NG Pam Authnft: before 0.2.0-alpha (fixed in 0.2.0-alpha)

Published 2026-05-12. Last modified 2026-06-17.