GSD-2021-1002329 sched/fair: Prevent dead task groups from regaining cfs_rq's
A use-after-free vulnerability in the Linux kernel scheduler allows local attackers to cause denial of service or potentially escalate privileges.
- 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-2021-1002329?
GSD-2021-1002329 is an use after free vulnerability in Kernel, published on 29 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
sched/fair: Prevent dead task groups from regaining cfs_rq's
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 v5.15.5 by commit 512e21c150c1c3ee298852660f3a796e267e62ec, it was introduced in version v5.13 by commit a7b359fc6a37faaf472125867c8dc5a068c90982. For more details please see the references link.
Which versions are affected by GSD-2021-1002329?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002329?
No fix has been published for GSD-2021-1002329 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-2021-1002329 being exploited?
There is no known exploitation of GSD-2021-1002329 in the wild and no public exploit code.