CVE-2024-38630
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.25%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.25% probability · 17th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/573601521277119f2e2ba5f28ae6e87fc594f4d4Patch
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.