CVE-2023-53745 um: vector: Fix memory leak in vector_config
A memory leak in the Linux kernel's vector configuration 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-2023-53745?
CVE-2023-53745 is a memory corruption vulnerability in Linux, published on 8 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:
um: vector: Fix memory leak in vector_config
If the return value of the uml_parse_vector_ifspec function is NULL, we should call kfree(params) to prevent memory leak.
Which versions are affected by CVE-2023-53745?
How do I fix CVE-2023-53745?
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-2023-53745 being exploited?
There is no known exploitation of CVE-2023-53745 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53745, DEBIAN-CVE-2023-53745, GHSA-49m9-4vrg-7r7p, UBUNTU-CVE-2023-53745.