{"id":"CVE-2026-72383","aliases":[],"url":"https://o3.security/vulnerability/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.","published":"2026-08-15T05:56:14.755Z","modified":"2026-08-16T03:48:27.740888648Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.18.40"}],"fix":null,"references":[{"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":"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-16T03:48:27.740888648Z"}}