{"id":"CVE-2026-89899","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cec: disable delayed work before freeing an interrupted transmit\n\ncec_transmit_msg_fh() drops adap->lock to wait for a blocking transmit in\nwait_for_completion_k…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cec: disable delayed work before freeing an interrupted transmit\n\ncec_transmit_msg_fh() drops adap->lock to wait for a blocking transmit in\nwait_for_completion_k…","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","vendor":"Linux","product":"Linux","affected":["Linux >= 490d84f6d73c12f4204241cff8651eed60aae914 < 9a951931d4b4084acd64fa55fc3672a9da45ddf9","Linux >= 490d84f6d73c12f4204241cff8651eed60aae914 < a3adb63b121937b97f7fdc51e96564c7c799538b","Linux >= 490d84f6d73c12f4204241cff8651eed60aae914 < 9c6ceb0949227c1f0cf0e19393daec72d9889871","Linux >= 490d84f6d73c12f4204241cff8651eed60aae914 < 0fbd5c2327020858c45b2d1c65775d64cdeca523","Linux e448dfd6d3ec944411f6575bc24e4f8baa1e297f","Linux 2781b86d7e45de09befa5ace296b66787146561f","Linux >= 4.18.19 < 4.19","Linux >= 4.19.2 < 4.20","Linux 4.20"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:16.183","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89899","references":[{"url":"https://git.kernel.org/stable/c/0fbd5c2327020858c45b2d1c65775d64cdeca523","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9a951931d4b4084acd64fa55fc3672a9da45ddf9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9c6ceb0949227c1f0cf0e19393daec72d9889871","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a3adb63b121937b97f7fdc51e96564c7c799538b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.979Z","epss":0.00163,"epssPercentile":0.05941,"slug":"CVE-2026-89899","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cec: disable delayed work before freeing an interrupted transmit\n\ncec_transmit_msg_fh() drops adap->lock to wait for a blocking transmit in\nwait_for_completion_killable(). If that wait is interrupted by a signal,\ncancel_delayed_work_sync() can run before the CEC kthread arms the reply\ntimeout via schedule_delayed_work(&data->work) in cec_transmit_done_ts().\nThe work is then armed after the cancel, and the data is freed with its\ndelayed_work still pending:\n\n  ODEBUG: free active (active state 0) object: ... hint: cec_wait_timeout\n\nUse disable_delayed_work_sync(): it cancels the work and disables it, so\nthe later schedule_delayed_work() becomes a no-op and the work cannot be\nre-armed. The data is freed right after, so it need not be re-enabled.\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":[{"seq":205158,"id":"CVE-2026-89899","ts":1789570705513,"field":"cvss","old":null,"new":"7.8"},{"seq":205157,"id":"CVE-2026-89899","ts":1789570705513,"field":"severity","old":"none","new":"high"}]}