CVE-2023-53743 PCI: Free released resource after coalescing
A memory leak in the Linux kernel PCI subsystem allows local attackers to exhaust system memory, potentially causing a denial of service.
- 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-2023-53743?
CVE-2023-53743 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:
PCI: Free released resource after coalescing
release_resource() doesn't actually free the resource or resource list entry so free the resource list entry to avoid a leak.
Which versions are affected by CVE-2023-53743?
How do I fix CVE-2023-53743?
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-2023-53743 being exploited?
There is no known exploitation of CVE-2023-53743 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53743, DEBIAN-CVE-2023-53743, GHSA-4fgr-37f3-cqrc, ROOT-OS-UBUNTU-2204-CVE-2023-53743, UBUNTU-CVE-2023-53743.