GSD-2022-1000608 psi: Fix uaf issue when psi trigger is destroyed while being polled
A use-after-free vulnerability in the Linux kernel PSI trigger polling allows local attackers to potentially escalate privileges or cause a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2022-1000608?
GSD-2022-1000608 is an use after free vulnerability in Kernel, published on 27 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
psi: Fix uaf issue when psi trigger is destroyed while being polled
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 v5.16.5 by commit 991ced6a3a926e58df1f446819b9f2790e1c0daa, it was introduced in version v5.2 by commit 0e94682b73bfa6c44c98af7a26771c9c08c055d5. For more details please see the references link.
Which versions are affected by GSD-2022-1000608?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1000608?
No fix has been published for GSD-2022-1000608 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-2022-1000608 being exploited?
There is no known exploitation of GSD-2022-1000608 in the wild and no public exploit code.