GSD-2021-1002742 net/sched: sch_ets: don't remove idle classes from the round-robin list
A flaw in the Linux Kernel ETS scheduler allows local attackers to cause a denial of service by manipulating idle class removal from the round-robin list.
- 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-2021-1002742?
GSD-2021-1002742 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
net/sched: sch_ets: don't remove idle classes from the round-robin list
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 491c1253441e2fdc8f6a6f4976e3f13440419b7a, it was introduced in version v5.15.6 by commit e25bdbc7e951ae5728fee1f4c09485df113d013c. For more details please see the references link.
Which versions are affected by GSD-2021-1002742?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002742?
No fix has been published for GSD-2021-1002742 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-2021-1002742 being exploited?
There is no known exploitation of GSD-2021-1002742 in the wild and no public exploit code.