GSD-2021-1002833 KVM: x86/mmu: Don't advance iterator after restart due to yielding
A flaw in the KVM x86 MMU iterator logic can cause a denial of service, requiring a kernel patch to fix.
- 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-2021-1002833?
GSD-2021-1002833 is a denial of service vulnerability in Kernel, published on 30 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
KVM: x86/mmu: Don't advance iterator after restart due to yielding
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 v5.15.12 by commit d884eefd75cc54887bc2e9e724207443525dfb2c, it was introduced in version v5.10 by commit faaf05b00aecdb347ffd1d763d024394ec0329f8. For more details please see the references link.
Which versions are affected by GSD-2021-1002833?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002833?
No fix has been published for GSD-2021-1002833 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-2021-1002833 being exploited?
There is no known exploitation of GSD-2021-1002833 in the wild and no public exploit code.