GSD-2021-1001662 blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd
A use-after-free vulnerability in the Linux kernel block cgroup subsystem could allow local attackers to execute code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Local or same network only
- Victim action needed
- Not stated
- Fix
- None listed
What is GSD-2021-1001662?
GSD-2021-1001662 is an use after free vulnerability in Kernel, published on 19 Oct 2021. It can only be exploited from the same machine or local network.
Official description
blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd
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 v5.10.70 by commit f58d305887ad7b24986d58e881f6806bb81b2bdf. For more details please see the references link.
Which versions are affected by GSD-2021-1001662?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001662?
No fix has been published for GSD-2021-1001662 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-2021-1001662 being exploited?
There is no known exploitation of GSD-2021-1001662 in the wild and no public exploit code.