GSD-2023-1001787 io_uring/io-wq: only free worker if it was allocated for creation
A use-after-free flaw in the Linux kernel io-wq subsystem 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-2023-1001787?
GSD-2023-1001787 is an use after free vulnerability in Kernel, published on 31 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
io_uring/io-wq: only free worker if it was allocated for creation
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 v5.10.164 by commit a88a0d16e18f18d7221f0c5a1fdf487f5f9079e3, it was introduced in version v5.10.164 by commit b912ed1363b363d587fe1aac9636ce9e9366a775. For more details please see the references link.
Which versions are affected by GSD-2023-1001787?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1001787?
No fix has been published for GSD-2023-1001787 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-2023-1001787 being exploited?
There is no known exploitation of GSD-2023-1001787 in the wild and no public exploit code.