CVE-2023-54320 platform/x86/amd: pmc: Fix memory leak in amd_pmc_stb_debugfs_open_v2()
A local attacker with high privileges can cause a memory leak in the AMD PMC driver, potentially leading to denial of service.
- 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-2023-54320?
CVE-2023-54320 is a memory corruption vulnerability in Linux, published on 30 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:
platform/x86/amd: pmc: Fix memory leak in amd_pmc_stb_debugfs_open_v2()
Function amd_pmc_stb_debugfs_open_v2() may be called when the STB debug mechanism enabled.
When amd_pmc_send_cmd() fails, the 'buf' needs to be released.
Which versions are affected by CVE-2023-54320?
How do I fix CVE-2023-54320?
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-2023-54320 being exploited?
There is no known exploitation of CVE-2023-54320 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-54320, GHSA-gjjf-pwjw-673q, ROOT-OS-UBUNTU-2204-CVE-2023-54320, UBUNTU-CVE-2023-54320.