GSD-2022-1002705 mce: fix set_mce_nospec to always unmap the whole page
A flaw in the Linux Kernel's Machine Check Exception handling could allow local attackers to execute arbitrary code or escalate privileges due to improper page unmapping.
- 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-2022-1002705?
GSD-2022-1002705 is a memory corruption vulnerability in Kernel, published on 28 Jun 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
mce: fix set_mce_nospec to always unmap the whole 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 v5.18.3 by commit 49ca50a98b3676c64a1fd02dd23989247e50b7ae, it was introduced in version v4.19 by commit 284ce4011ba60d6c487b668eea729b6294930806. For more details please see the references link.
Which versions are affected by GSD-2022-1002705?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1002705?
No fix has been published for GSD-2022-1002705 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is GSD-2022-1002705 being exploited?
There is no known exploitation of GSD-2022-1002705 in the wild and no public exploit code.