GSD-2021-1001194 watchdog: Fix possible use-after-free in wdt_startup()
A use-after-free flaw in the Linux kernel watchdog driver allows local attackers to potentially escalate privileges or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001194?
GSD-2021-1001194 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 in wdt_startup()
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 v5.13.4 by commit 8adbbe6c86bb13e14f8a19e036ae5f4f5661fd90. For more details please see the references link.
Which versions are affected by GSD-2021-1001194?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001194?
No fix has been published for GSD-2021-1001194 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-2021-1001194 being exploited?
There is no known exploitation of GSD-2021-1001194 in the wild and no public exploit code.