GSD-2021-1000057 io_uring: fix shared sqpoll cancellation hangs
A local attacker can cause a denial of service by triggering hangs in shared sqpoll cancellation within the Linux kernel io_uring subsystem.
- 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-2021-1000057?
GSD-2021-1000057 is a denial of service vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
io_uring: fix shared sqpoll cancellation hangs
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 v5.12.3 by commit cb5e0b3d0f993a6268c1a2c7ede2f9aa0c17ef68, it was introduced in version v5.12 by commit 37d1e2e3642e2380750d7f35279180826f29660e. For more details please see the references link.
Which versions are affected by GSD-2021-1000057?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000057?
No fix has been published for GSD-2021-1000057 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is GSD-2021-1000057 being exploited?
There is no known exploitation of GSD-2021-1000057 in the wild and no public exploit code.