{"id":"CVE-2026-72383","title":"sctp: fix addr_wq_timer race in sctp_free_addr_wq()","summary":"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, time…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 4db67e808640e3934d82ce61ee8e2e89fd877ba8 < a8323fb2ab6cd6978f359daeed6688e0cadf32ba","Linux >= 4db67e808640e3934d82ce61ee8e2e89fd877ba8 < c3e5cac47519d77ad36b9c03a1df1536aaa0c4a1","Linux >= 4db67e808640e3934d82ce61ee8e2e89fd877ba8 < 976c19de0f22a857ba0112f39635f8fd7a257568","Linux 3.7"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:48:17.297535Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:55:20.967Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72383","references":[{"url":"https://git.kernel.org/stable/c/a8323fb2ab6cd6978f359daeed6688e0cadf32ba"},{"url":"https://git.kernel.org/stable/c/c3e5cac47519d77ad36b9c03a1df1536aaa0c4a1"},{"url":"https://git.kernel.org/stable/c/976c19de0f22a857ba0112f39635f8fd7a257568"}],"tags":["cve.org"],"epss":0.00161,"epssPercentile":0.04907,"ingestedAt":"2026-10-16T19:46:24.402Z","slug":"CVE-2026-72383","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 4db67e808640e3934d82ce61ee8e2e89fd877ba8 < a8323fb2ab6cd6978f359daeed6688e0cadf32ba`\n- `Linux >= 4db67e808640e3934d82ce61ee8e2e89fd877ba8 < c3e5cac47519d77ad36b9c03a1df1536aaa0c4a1`\n- `Linux >= 4db67e808640e3934d82ce61ee8e2e89fd877ba8 < 976c19de0f22a857ba0112f39635f8fd7a257568`\n- `Linux 3.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}