GSD-2021-1001892 netfilter: nf_tables: skip netdev events generated on netns removal
A flaw in the Linux kernel netfilter subsystem could allow local attackers to cause a denial of service during network namespace removal.
- 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-2021-1001892?
GSD-2021-1001892 is a denial of service 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: nf_tables: skip netdev events generated on netns removal
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 90c7c58aa2bd02c65a4c63b7dfe0b16eab12cf9f, it was introduced in version v5.11 by commit 767d1216bff82507c945e92fe719dff2083bb2f4. For more details please see the references link.
Which versions are affected by GSD-2021-1001892?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001892?
No fix has been published for GSD-2021-1001892 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-2021-1001892 being exploited?
There is no known exploitation of GSD-2021-1001892 in the wild and no public exploit code.