GSD-2023-1001985 io_uring/io-wq: only free worker if it was allocated for creation
A use-after-free vulnerability 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-2023-1001985?
GSD-2023-1001985 is an use after free vulnerability in Kernel, published on 13 Feb 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 v6.1.7 by commit e62e6258ab140b55bbef1f0d288263b75e2f0c20, it was introduced in version v6.1.7 by commit 0a14c3ded80c7dd399e68f361ee3338b5271c98e. For more details please see the references link.
Which versions are affected by GSD-2023-1001985?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2023-1001985?
No fix has been published for GSD-2023-1001985 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-2023-1001985 being exploited?
There is no known exploitation of GSD-2023-1001985 in the wild and no public exploit code.