GSD-2021-1000038 netfilter: nft_limit: avoid possible divide error in nft_limit_init
A divide-by-zero error in the Linux kernel netfilter limit module can cause a system crash, requiring privileged access to trigger.
- 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-2021-1000038?
GSD-2021-1000038 is a denial of service vulnerability in Kernel, published on 31 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
netfilter: nft_limit: avoid possible divide error in nft_limit_init
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 v5.4.114 by commit 01fb1626b620cb37a65ad08e0f626489e8f042ef, it was introduced in version v4.13 by commit c26844eda9d4fdbd266660e3b3de2d0270e3a1ed. For more details please see the references link.
Which versions are affected by GSD-2021-1000038?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1000038?
No fix has been published for GSD-2021-1000038 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-2021-1000038 being exploited?
There is no known exploitation of GSD-2021-1000038 in the wild and no public exploit code.