GSD-2021-1000903 KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message
A flaw in the Linux Kernel KVM x86 module could allow a local attacker to cause a denial of service via nested VM-Enter failures.
- 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-2021-1000903?
GSD-2021-1000903 is a denial of service vulnerability in Kernel, published on 30 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
KVM: x86: Ensure liveliness of nested VM-Enter fail tracepoint message
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 v5.4.126 by commit 796d3bd4ac9316e70c181189318cd2bd98af34bc, it was introduced in version v5.4 by commit 380e0055bc7e4a5c687436ba3ccebb4667836b95. For more details please see the references link.
Which versions are affected by GSD-2021-1000903?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000903?
No fix has been published for GSD-2021-1000903 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-2021-1000903 being exploited?
There is no known exploitation of GSD-2021-1000903 in the wild and no public exploit code.