{"id":"CVE-2023-3609","details":"A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation.\n\nIf tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.\n\nWe recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.","modified":"2026-03-15T22:46:59.158847Z","published":"2023-07-21T21:15:11.743Z","related":["ALSA-2023:7077","SUSE-SU-2023:3182-1","SUSE-SU-2023:3302-1","SUSE-SU-2023:3309-1","SUSE-SU-2023:3311-1","SUSE-SU-2023:3313-1","SUSE-SU-2023:3318-1","SUSE-SU-2023:3329-1","SUSE-SU-2023:3349-1","SUSE-SU-2023:3376-1","SUSE-SU-2023:3390-1","SUSE-SU-2023:3391-1","SUSE-SU-2023:3392-1","SUSE-SU-2023:3421-1","SUSE-SU-2023:3749-1","SUSE-SU-2023:3768-1","SUSE-SU-2023:3772-1","SUSE-SU-2023:3773-1","SUSE-SU-2023:3783-1","SUSE-SU-2023:3784-1","SUSE-SU-2023:3786-1","SUSE-SU-2023:3788-1","SUSE-SU-2023:3809-1","SUSE-SU-2023:3812-1","SUSE-SU-2023:3838-1","SUSE-SU-2023:3844-1","SUSE-SU-2023:3846-1","SUSE-SU-2023:3889-1","SUSE-SU-2023:3892-1","SUSE-SU-2023:3893-1","SUSE-SU-2023:3922-1","SUSE-SU-2023:3923-1","SUSE-SU-2023:3924-1","SUSE-SU-2023:3928-1"],"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"},{"type":"WEB","url":"http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"},{"type":"ADVISORY","url":"https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230818-0005/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5480"},{"type":"ADVISORY","url":"http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"4.14"},{"fixed":"6.4"}]},{"events":[{"introduced":"0"},{"last_affected":"6.4-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"6.4-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"6.4-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"6.4-rc4"}]},{"events":[{"introduced":"0"},{"last_affected":"6.4-rc5"}]},{"events":[{"introduced":"0"},{"last_affected":"6.4-rc6"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"11.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-3609.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}