{"id":"CVE-2023-3609","summary":"Use-after-free in Linux kernel's net/sched: cls_u32 component","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":"2026-05-08T04:52:12.793673Z","published":"2023-07-21T20:47:12.172Z","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"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3609.json","cwe_ids":["CWE-416"],"cna_assigner":"Google"},"references":[{"type":"WEB","url":"http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html"},{"type":"WEB","url":"http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html"},{"type":"WEB","url":"https://git.kernel.org"},{"type":"WEB","url":"https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3609.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-3609"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20230818-0005/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5480"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","events":[{"introduced":"bebc6082da0a9f5d47a1ea2edc099bf671058bd4"},{"fixed":"6995e2de6891c724bfeb2db33d7b87775f913ad1"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.14"},{"fixed":"6.4"}]}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-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"}]}