{"id":"CVE-2026-43916","summary":"pam_authnft: Heap buffer overflow in NETLINK_SOCK_DIAG reply walker","details":"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.","aliases":["GHSA-5jj5-hm34-78vh"],"modified":"2026-07-08T08:13:29.504241184Z","published":"2026-05-12T13:31:44.359Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-125","CWE-191"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43916.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43916.json"},{"type":"ADVISORY","url":"https://github.com/identd-ng/pam_authnft/security/advisories/GHSA-5jj5-hm34-78vh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43916"},{"type":"FIX","url":"https://github.com/identd-ng/pam_authnft/pull/10"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/identd-ng/pam_authnft","events":[{"introduced":"0"},{"fixed":"75f2c8bfb0ffc63e68979928e0b1aa3f457263aa"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.2.0-alpha"}],"source":"AFFECTED_FIELD"}}],"versions":["v0.1.0-alpha"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43916.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}