CVE-2026-43916 — pam_authnft: Heap buffer overflow in NETLINK_SOCK_DIAG reply walker
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_t…
Published: 2026-05-12 · CVSS: 8.7 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7