GSD-2021-1000805 io_uring: fix ltout double free on completion race
A double free race condition in the Linux kernel io_uring subsystem allows local attackers to cause denial of service or potentially escalate privileges.
- 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-2021-1000805?
GSD-2021-1000805 is an use after free vulnerability in Kernel, published on 25 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
io_uring: fix ltout double free on completion race
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 v5.12.10 by commit 1f64f5e903b9d1d157875721e02adadc9d6f0a5d, it was introduced in version v5.11 by commit 90cd7e424969d29aff653333b4dcb4e2e199d791. For more details please see the references link.
Which versions are affected by GSD-2021-1000805?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000805?
No fix has been published for GSD-2021-1000805 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-2021-1000805 being exploited?
There is no known exploitation of GSD-2021-1000805 in the wild and no public exploit code.