{"id":"CVE-2026-72383","summary":"sctp: fix addr_wq_timer race in sctp_free_addr_wq()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix addr_wq_timer race in sctp_free_addr_wq()\n\nsctp_free_addr_wq() previously removed addr_wq_timer using timer_delete()\nwhile holding addr_wq_lock. However, timer_delete() does not guarantee that\na currently running timer handler has completed.\n\nThis allows a race with sctp_addr_wq_timeout_handler(), where the handler\nmay still run after addr_waitq has been freed, acquire addr_wq_lock, and\naccess freed memory, leading to a use-after-free.\n\nFix this by calling timer_shutdown_sync() before taking addr_wq_lock.  This\nguarantees that any in-flight timer handler has finished and prevents the\ntimer from being re-armed during teardown, making subsequent cleanup safe.","modified":"2026-11-01T02:30:41.517808319Z","published":"2026-08-15T05:56:14.755Z","related":["SUSE-SU-2026:24179-1","SUSE-SU-2026:24181-1","SUSE-SU-2026:24182-1","SUSE-SU-2026:24184-1","SUSE-SU-2026:24197-1","SUSE-SU-2026:24235-1","SUSE-SU-2026:24315-1","SUSE-SU-2026:24316-1","SUSE-SU-2026:4640-1","SUSE-SU-2026:4660-1","SUSE-SU-2026:4665-1","SUSE-SU-2026:4666-1","SUSE-SU-2026:4667-1","SUSE-SU-2026:4668-1","SUSE-SU-2026:4687-1","SUSE-SU-2026:4706-1","openSUSE-SU-2026:22091-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72383.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/5098308ad72f83f3b1a48c247dddab1695114bae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/976c19de0f22a857ba0112f39635f8fd7a257568"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a8323fb2ab6cd6978f359daeed6688e0cadf32ba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c3e5cac47519d77ad36b9c03a1df1536aaa0c4a1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d49eff15261dd62e4fa3a316c26cb1f537a60464"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb6117713abef8646fdbf58256532451bcf26c47"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72383.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72383"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4db67e808640e3934d82ce61ee8e2e89fd877ba8"},{"fixed":"fb6117713abef8646fdbf58256532451bcf26c47"},{"fixed":"5098308ad72f83f3b1a48c247dddab1695114bae"},{"fixed":"d49eff15261dd62e4fa3a316c26cb1f537a60464"},{"fixed":"a8323fb2ab6cd6978f359daeed6688e0cadf32ba"},{"fixed":"c3e5cac47519d77ad36b9c03a1df1536aaa0c4a1"},{"fixed":"976c19de0f22a857ba0112f39635f8fd7a257568"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72383.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.7.0"},{"fixed":"6.1.191"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.114"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72383.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}