GSD-2021-1001893 netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value
A local attacker with high privileges can trigger a kernel panic in the netfilter IDLETIMER module by providing an invalid timer type, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001893?
GSD-2021-1001893 is a vulnerability in Kernel, published on 28 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value
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 v5.14.15 by commit cae7cab804c943d723d52724a3aeb07a3f4a2650, it was introduced in version v5.7 by commit 68983a354a655c35d3fb204489d383a2a051fda7. For more details please see the references link.
Which versions are affected by GSD-2021-1001893?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001893?
No fix has been published for GSD-2021-1001893 yet. Limit exposure of the affected software until one is available.
Is GSD-2021-1001893 being exploited?
There is no known exploitation of GSD-2021-1001893 in the wild and no public exploit code.