GSD-2021-1000492 x86/sev-es: Don't return NULL from sev_es_get_ghcb()
A null pointer dereference in the Linux kernel's SEV-ES handler can cause a system crash, requiring a kernel patch to resolve.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1000492?
GSD-2021-1000492 is a vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
x86/sev-es: Don't return NULL from sev_es_get_ghcb()
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 v5.12.7 by commit efbfc33b0b1c241311553d3c2229974ec1d684e2, it was introduced in version v5.10 by commit 0786138c78e79343c7b015d77507cbf9d5f15d00. For more details please see the references link.
Which versions are affected by GSD-2021-1000492?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000492?
No fix has been published for GSD-2021-1000492 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1000492 being exploited?
There is no known exploitation of GSD-2021-1000492 in the wild and no public exploit code.