GSD-2021-1000759 x86/kvm: Disable kvmclock on all CPUs on shutdown
A flaw in the Linux Kernel KVM module could cause a denial of service during system shutdown if kvmclock is not disabled on all CPUs.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000759?
GSD-2021-1000759 is a denial of service 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
x86/kvm: Disable kvmclock on all CPUs on shutdown
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 v5.4.125 by commit 9084fe1b3572664ad276f427dce575f580c9799a, it was introduced in version by commit . For more details please see the references link.
Which versions are affected by GSD-2021-1000759?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000759?
No fix has been published for GSD-2021-1000759 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-2021-1000759 being exploited?
There is no known exploitation of GSD-2021-1000759 in the wild and no public exploit code.