CVE-2023-54003 RDMA/core: Fix GID entry ref leak when create_ah fails
A reference leak in the Linux kernel RDMA core allows local attackers to cause a denial of service by exhausting GID table resources.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-54003?
CVE-2023-54003 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:
RDMA/core: Fix GID entry ref leak when create_ah fails
If AH create request fails, release sgid_attr to avoid GID entry referrence leak reported while releasing GID table
Which versions are affected by CVE-2023-54003?
How do I fix CVE-2023-54003?
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-2023-54003 being exploited?
There is no known exploitation of CVE-2023-54003 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54003, DEBIAN-CVE-2023-54003, GHSA-v7fh-fh2g-3493, UBUNTU-CVE-2023-54003.