CVE-2023-54055 RDMA/irdma: Fix memory leak of PBLE objects
A memory leak in the Linux kernel's irdma RDMA driver allows local attackers to cause a denial of service by exhausting system memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-54055?
CVE-2023-54055 is a memory corruption 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/irdma: Fix memory leak of PBLE objects
On rmmod of irdma, the PBLE object memory is not being freed. PBLE object memory are not statically pre-allocated at function initialization time unlike other HMC objects. PBLEs objects and the Segment Descriptors (SD) for it can be dynamically allocated during scale up and SD's remain allocated till function deinitialization.
Fix this leak by adding IRDMA_HMC_IW_PBLE to the iw_hmc_obj_types[] table and skip pbles in irdma_create_hmc_obj but not in irdma_del_hmc_objects().
Which versions are affected by CVE-2023-54055?
How do I fix CVE-2023-54055?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-54055 being exploited?
There is no known exploitation of CVE-2023-54055 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54055, DEBIAN-CVE-2023-54055, GHSA-8x32-fq94-j5fv, UBUNTU-CVE-2023-54055.