GSD-2021-1000761 neighbour: allow NUD_NOARP entries to be forced GCed
A flaw in the Linux kernel neighbor subsystem allows forced garbage collection of NUD_NOARP entries, potentially leading to denial of service.
- 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-2021-1000761?
GSD-2021-1000761 is a denial of service vulnerability in Kernel, published on 25 Jun 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
neighbour: allow NUD_NOARP entries to be forced GCed
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 v5.4.125 by commit d99029e6aab62aef0a0251588b2867e77e83b137, it was introduced in version v5.0 by commit 58956317c8de52009d1a38a721474c24aef74fe7. For more details please see the references link.
Which versions are affected by GSD-2021-1000761?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000761?
No fix has been published for GSD-2021-1000761 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-2021-1000761 being exploited?
There is no known exploitation of GSD-2021-1000761 in the wild and no public exploit code.