CVE-2024-38630: watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger
First published: Fri Jun 21 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=3.8<6.6.33 | |
| Linux Linux kernel | >=6.7<6.9.4 | |
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.115-1<=6.1.112-1 | 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4
- https://git.kernel.org/stable/c/9b1c063ffc075abf56f63e55d70b9778ff534314
- https://git.kernel.org/stable/c/f19686d616500cd0d47b30cee82392b53f7f784a
- https://launchpad.net/bugs/cve/CVE-2024-38630
- https://git.kernel.org/linus/573601521277119f2e2ba5f28ae6e87fc594f4d4
- https://security-tracker.debian.org/tracker/CVE-2024-38630
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-38630
- https://nvd.nist.gov/vuln/detail/CVE-2024-38630
- https://ubuntu.com/security/CVE-2024-38630
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