{"id":"CVE-2023-39189","details":"A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.","modified":"2026-04-16T04:35:39.941374350Z","published":"2023-10-09T18:15:10.160Z","related":["ALSA-2024:2394","SUSE-SU-2023:4343-1","SUSE-SU-2023:4345-1","SUSE-SU-2023:4346-1","SUSE-SU-2023:4347-1","SUSE-SU-2023:4348-1","SUSE-SU-2023:4349-1","SUSE-SU-2023:4351-1","SUSE-SU-2023:4358-1","SUSE-SU-2023:4359-1","SUSE-SU-2023:4375-1","SUSE-SU-2023:4377-1","SUSE-SU-2023:4378-1","SUSE-SU-2023:4414-1","SUSE-SU-2024:0112-1","USN-6537-1","USN-6573-1"],"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:3138"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2023-39189"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:2394"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:2950"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2226777"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"6.6"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"38"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-39189.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H"}]}