Description
In the Linux kernel, the following vulnerability has been resolved:
watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger
When the cpu5wdt module is removing, the origin code uses del_timer() to de-activate the timer. If the timer handler is running, del_timer() could not stop it and will return directly. If the port region is released by release_region() and then the timer handler cpu5wdt_trigger() calls outb() to write into the region that is released, the use-after-free bug will happen.
Change del_timer() to timer_shutdown_sync() in order that the timer handler could be finished before the port region is released.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 948ed659c0151a605bd126da1e95f350ec5a7956; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9abe50e8492d1accd7d8dc17991179472d3d4573; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9b1c063ffc075abf56f63e55d70b9778ff534314; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f19686d616500cd0d47b30cee82392b53f7f784a; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 573601521277119f2e2ba5f28ae6e87fc594f4d4 |
| Linux | Linux | 2.6.12 |
References
- https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4Patch
- https://git.kernel.org/stable/c/948ed659c0151a605bd126da1e95f350ec5a7956
- https://git.kernel.org/stable/c/9abe50e8492d1accd7d8dc17991179472d3d4573
- https://git.kernel.org/stable/c/9b1c063ffc075abf56f63e55d70b9778ff534314Patch
- https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784aPatch
- https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4Patch
- https://git.kernel.org/stable/c/9b1c063ffc075abf56f63e55d70b9778ff534314Patch
- https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784aPatch
Timeline
- Published
- Jun 21, 2024
- Last modified
- Oct 30, 2026
- NVD status
- Modified