GSD-2021-1002267 tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc
A softlockup in the Linux kernel tty buffer flush function can cause a denial of service, requiring a kernel patch.
- 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-2021-1002267?
GSD-2021-1002267 is a denial of service vulnerability in Kernel, published on 29 Nov 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc
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 v5.4.162 by commit d491c84df5c469dd9621863b6a770b3428137063. For more details please see the references link.
Which versions are affected by GSD-2021-1002267?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1002267?
No fix has been published for GSD-2021-1002267 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-2021-1002267 being exploited?
There is no known exploitation of GSD-2021-1002267 in the wild and no public exploit code.