CVE-2023-54133 nfp: clean mc addresses in application firmware when closing port
A resource leak in the Linux kernel NFP driver allows local attackers to cause denial of service by moving network devices between namespaces.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-54133?
CVE-2023-54133 is a denial of service vulnerability in Linux, published on 24 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
nfp: clean mc addresses in application firmware when closing port
When moving devices from one namespace to another, mc addresses are cleaned in software while not removed from application firmware. Thus the mc addresses are remained and will cause resource leak.
Now use `__dev_mc_unsync` to clean mc addresses when closing port.
Which versions are affected by CVE-2023-54133?
How do I fix CVE-2023-54133?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-54133 being exploited?
There is no known exploitation of CVE-2023-54133 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54133, DEBIAN-CVE-2023-54133, GHSA-rhjm-7jhc-x7ww, UBUNTU-CVE-2023-54133.