GSD-2021-1001798 efi: Change down_interruptible() in virt_efi_reset_system() to down_trylock()
A potential denial of service vulnerability in the Linux Kernel EFI subsystem was addressed by replacing a blocking lock with a trylock.
- 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-2021-1001798?
GSD-2021-1001798 is a denial of service vulnerability in Kernel, published on 28 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
efi: Change down_interruptible() in virt_efi_reset_system() to down_trylock()
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 v4.14.252 by commit 2d1792c078cd1b9f28ee3c7d3f1f8c2087ea39fd. For more details please see the references link.
Which versions are affected by GSD-2021-1001798?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001798?
No fix has been published for GSD-2021-1001798 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GSD-2021-1001798 being exploited?
There is no known exploitation of GSD-2021-1001798 in the wild and no public exploit code.