GSD-2021-1001681 powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
A flaw in the Linux kernel powerpc/64s architecture allows an unrecoverable Machine Check Exception to cause a system crash when an async handler is called from NMI context.
- 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-2021-1001681?
GSD-2021-1001681 is a denial of service vulnerability in Kernel, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
powerpc/64s: Fix unrecoverable MCE calling async handler from NMI
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 v5.14.12 by commit d7a8e38999fbd6910516e44cb43f9f4317e54f73, it was introduced in version v5.14 by commit 2b43dd7653cca47d297756980846ebbfe8887fa1. For more details please see the references link.
Which versions are affected by GSD-2021-1001681?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001681?
No fix has been published for GSD-2021-1001681 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-2021-1001681 being exploited?
There is no known exploitation of GSD-2021-1001681 in the wild and no public exploit code.