GSD-2021-1002759 iocost: Fix divide-by-zero on donation from low hweight cgroup
A divide-by-zero error in the Linux kernel iocost controller allows local attackers to cause a system crash.
- 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-2021-1002759?
GSD-2021-1002759 is a denial of service vulnerability in Kernel, published on 27 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
iocost: Fix divide-by-zero on donation from low hweight cgroup
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 v5.15.11 by commit 3a1a4eb574178c21241a6200f4785572e661c472, it was introduced in version v5.10 by commit f1de2439ec43b74764f2a26e3a310b24407e3bde. For more details please see the references link.
Which versions are affected by GSD-2021-1002759?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002759?
No fix has been published for GSD-2021-1002759 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-2021-1002759 being exploited?
There is no known exploitation of GSD-2021-1002759 in the wild and no public exploit code.