GSD-2021-1000931 KVM: x86: Immediately reset the MMU context when the SMM flag is cleared
A flaw in KVM x86 MMU context handling upon SMM flag clearing could allow guest-to-host privilege escalation or code execution.
- 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-2021-1000931?
GSD-2021-1000931 is a 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: Immediately reset the MMU context when the SMM flag is cleared
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 v5.4.128 by commit cbb425f62df9df7abee4b3f068f7ed6ffc3561e2, it was introduced in version v5.1 by commit 9ec19493fb86d6d5fbf9286b94ff21e56ef66376. For more details please see the references link.
Which versions are affected by GSD-2021-1000931?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000931?
No fix has been published for GSD-2021-1000931 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000931 being exploited?
There is no known exploitation of GSD-2021-1000931 in the wild and no public exploit code.