GSD-2021-1002539 arm64: uaccess: avoid blocking within critical sections
A flaw in the Linux kernel arm64 uaccess implementation could allow blocking within critical sections, potentially leading to 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-2021-1002539?
GSD-2021-1002539 is a denial of service vulnerability in Kernel, published on 19 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
arm64: uaccess: avoid blocking within critical sections
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 v5.15.6 by commit ff1a30740f7aa78699cea964640df6ff4f034bb5, it was introduced in version v5.11 by commit f253d827f33cb5a5990b5cfd271941d1a21ecd85. For more details please see the references link.
Which versions are affected by GSD-2021-1002539?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002539?
No fix has been published for GSD-2021-1002539 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-2021-1002539 being exploited?
There is no known exploitation of GSD-2021-1002539 in the wild and no public exploit code.