GSD-2021-1000463 regmap: set debugfs_name to NULL after it is freed
A use-after-free vulnerability in the Linux kernel regmap debugfs interface could allow local attackers to cause a denial of service or potentially execute code.
- 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-2021-1000463?
GSD-2021-1000463 is an use after free vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
regmap: set debugfs_name to NULL after it is freed
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 v4.19.191 by commit 2dc1554d5f0fdaf47cc5bea442b84b9226fea867, it was introduced in version v4.19.168 by commit 5b654b03007917f3f1015b2a5c288c1ea6ae8f65. For more details please see the references link.
Which versions are affected by GSD-2021-1000463?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000463?
No fix has been published for GSD-2021-1000463 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-2021-1000463 being exploited?
There is no known exploitation of GSD-2021-1000463 in the wild and no public exploit code.