GSD-2021-1000444 powerpc/64s: Fix crashes when toggling entry flush barrier
A flaw in the Linux kernel powerpc/64s subsystem causes crashes when toggling the entry flush barrier, leading to denial of service.
- 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-2021-1000444?
GSD-2021-1000444 is a denial of service 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
powerpc/64s: Fix crashes when toggling entry flush barrier
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 v4.19.191 by commit 2db22ba4e0e103f00e0512e0ecce36ac78c644f8, it was introduced in version v4.19.159 by commit f69bb4e51f41973fb7594be1479fa689831efe1a. For more details please see the references link.
Which versions are affected by GSD-2021-1000444?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000444?
No fix has been published for GSD-2021-1000444 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-2021-1000444 being exploited?
There is no known exploitation of GSD-2021-1000444 in the wild and no public exploit code.