GSD-2022-1001676 mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
A local attacker can trigger unnecessary memory invalidations in the Linux kernel, potentially causing a denial of service.
- 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-2022-1001676?
GSD-2022-1001676 is a denial of service vulnerability in Kernel, published on 24 Apr 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
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 v5.15.34 by commit a04cb99c5d4668fe3f5c0e5b6da1cecd34c3f219. For more details please see the references link.
Which versions are affected by GSD-2022-1001676?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2022-1001676?
No fix has been published for GSD-2022-1001676 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-2022-1001676 being exploited?
There is no known exploitation of GSD-2022-1001676 in the wild and no public exploit code.