{"id":"CVE-2024-38630","title":"watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger\n\nWhen the cpu5wdt module is removing, the origin code uses del_timer() to\nde-activate the timer. I…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 948ed659c0151a605bd126da1e95f350ec5a7956","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9abe50e8492d1accd7d8dc17991179472d3d4573","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9b1c063ffc075abf56f63e55d70b9778ff534314","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f19686d616500cd0d47b30cee82392b53f7f784a","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 573601521277119f2e2ba5f28ae6e87fc594f4d4","Linux 2.6.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-09-10T17:09:05.880196Z"},"published":"2024-06-21","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:18:35.686Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-38630","references":[{"url":"https://git.kernel.org/stable/c/948ed659c0151a605bd126da1e95f350ec5a7956"},{"url":"https://git.kernel.org/stable/c/9abe50e8492d1accd7d8dc17991179472d3d4573"},{"url":"https://git.kernel.org/stable/c/9b1c063ffc075abf56f63e55d70b9778ff534314"},{"url":"https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784a"},{"url":"https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4"}],"tags":["cve.org"],"epss":0.00251,"epssPercentile":0.16564,"ingestedAt":"2026-11-03T12:44:28.821Z","slug":"CVE-2024-38630","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger\n\nWhen the cpu5wdt module is removing, the origin code uses del_timer() to\nde-activate the timer. If the timer handler is running, del_timer() could\nnot stop it and will return directly. If the port region is released by\nrelease_region() and then the timer handler cpu5wdt_trigger() calls outb()\nto write into the region that is released, the use-after-free bug will\nhappen.\n\nChange del_timer() to timer_shutdown_sync() in order that the timer handler\ncould be finished before the port region is released.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 948ed659c0151a605bd126da1e95f350ec5a7956`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9abe50e8492d1accd7d8dc17991179472d3d4573`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9b1c063ffc075abf56f63e55d70b9778ff534314`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < f19686d616500cd0d47b30cee82392b53f7f784a`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 573601521277119f2e2ba5f28ae6e87fc594f4d4`\n- `Linux 2.6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}