GSD-2021-1001020 KVM: X86: MMU: Use the correct inherited permissions to get shadow page
A flaw in KVM MMU permission inheritance allows local attackers to escalate privileges within the Linux kernel.
- 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-2021-1001020?
GSD-2021-1001020 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: MMU: Use the correct inherited permissions to get shadow page
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 v5.12.11 by commit 7707f7244d813f8279143d5dfdee7a318801231b, it was introduced in version v2.6.20 by commit cea0f0e7ea54753c3265dc77f605a6dad1912cfc. For more details please see the references link.
Which versions are affected by GSD-2021-1001020?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001020?
No fix has been published for GSD-2021-1001020 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1001020 being exploited?
There is no known exploitation of GSD-2021-1001020 in the wild and no public exploit code.