pam_authnft: Heap buffer overflow in NETLINK_SOCK_DIAG reply walker_CVE-2026-43916

8.7 / 10

HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Description

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.

Basic Information

ID CVE-2026-43916

Source GitHub_M

Published May 12, 2026 at 13:31

Affected Product

Vendor identd-ng

Product pam_authnft

Version < 0.2.0-alpha

Affected Versions identd-ng pam_authnft < 0.2.0-alpha

CWE Classification

CWE-125 CWE-191

References

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    "published": "2026-05-12T13:31:44.359Z",
    "modified": "2026-05-12T13:31:44.359Z",
    "type": "cve",
    "title": "pam_authnft: Heap buffer overflow in NETLINK_SOCK_DIAG reply walker",
    "source": "GitHub_M",
    "references": "https://github.com/identd-ng/pam_authnft/security/advisories/GHSA-5jj5-hm34-78vh\nhttps://github.com/identd-ng/pam_authnft/pull/10",
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