GSD-2021-1001330 watchdog: Fix possible use-after-free by calling del_timer_sync()
A potential use-after-free vulnerability in the Linux kernel watchdog subsystem requires patching to prevent undefined behavior.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- None listed
What is GSD-2021-1001330?
GSD-2021-1001330 is an use after free vulnerability in Kernel, published on 3 Aug 2021.
Official description
watchdog: Fix possible use-after-free by calling del_timer_sync()
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.4.134 by commit db222f1477ad5692cd454709b714949807e5d111. For more details please see the references link.
Which versions are affected by GSD-2021-1001330?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001330?
No fix has been published for GSD-2021-1001330 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is GSD-2021-1001330 being exploited?
There is no known exploitation of GSD-2021-1001330 in the wild and no public exploit code.