{"id":"CVE-2026-80622","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nchar: tlclk: fix use-after-free in tlclk_cleanup()\n\nThis patch improves the module cleanup process in the tlclk driver to\nprevent potential use-after-free and race cond…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nchar: tlclk: fix use-after-free in tlclk_cleanup()\n\nThis patch improves the module cleanup process in the tlclk driver to\nprevent potential use-after-free and race cond…","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 >= 1a80ba88273097933f93b1f40537337416798c70 < 09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a","Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 96902299a22d126ef5eb3f45cd5d8ceea9e6a735","Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 166dd1d5265e067459e674c11688919901813ec2","Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 764723bd67a6c8f53a8d8309211fb039e2ebcf49","Linux >= 1a80ba88273097933f93b1f40537337416798c70 < c3f0cd76561ae611c2d247ee96dfd559e4197cb7","Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 3d5e4cc0d9dce79b0429da3134ac7b072ab9009f","Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 42223445607a9a5df3cb1c4729abfe3a5085e7ce","Linux >= 1a80ba88273097933f93b1f40537337416798c70 < bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1","Linux 2.6.15"],"published":"2026-08-28","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:18:04.193","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80622","references":[{"url":"https://git.kernel.org/stable/c/09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/166dd1d5265e067459e674c11688919901813ec2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3d5e4cc0d9dce79b0429da3134ac7b072ab9009f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/42223445607a9a5df3cb1c4729abfe3a5085e7ce","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/764723bd67a6c8f53a8d8309211fb039e2ebcf49","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/96902299a22d126ef5eb3f45cd5d8ceea9e6a735","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c3f0cd76561ae611c2d247ee96dfd559e4197cb7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00171,"epssPercentile":0.06449,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T19:18:55.907096Z"},"ingestedAt":"2026-08-29T23:43:56.365Z","slug":"CVE-2026-80622","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nchar: tlclk: fix use-after-free in tlclk_cleanup()\n\nThis patch improves the module cleanup process in the tlclk driver to\nprevent potential use-after-free and race conditions.\n\nCurrently, the file_operations structure does not specify the .owner\nfield, which could allow the module to be unloaded while user-space\nprocesses are still interacting with the device. Additionally, the\ntlclk_cleanup() function frees the alarm_events memory before ensuring\nthat blocked processes in the waitqueue are fully awakened and that the\nswitchover_timer has completed.\n\nTo address these cases, this patch:\n- Sets '.owner = THIS_MODULE' in tlclk_fops to safely defer module\n  unloading while the device is in use.\n- Updates tlclk_cleanup() to explicitly wake up all blocked readers\n  (wake_up_all), properly release hardware I/O regions, and safely\n  delete the timer (timer_delete_sync) prior to freeing memory.\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":[]}