GSD-2021-1001269 watchdog: Fix possible use-after-free by calling del_timer_sync()
A use-after-free vulnerability in the Linux kernel watchdog subsystem could allow local attackers to execute arbitrary code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001269?
GSD-2021-1001269 is an use after free vulnerability in Kernel, published on 3 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.
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 v5.10.52 by commit 66ba9cf929b1c4fabf545bd4c18f6f64e23e46e4. For more details please see the references link.
Which versions are affected by GSD-2021-1001269?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001269?
No fix has been published for GSD-2021-1001269 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-2021-1001269 being exploited?
There is no known exploitation of GSD-2021-1001269 in the wild and no public exploit code.