CVE-2023-54320: platform/x86/amd: pmc: Fix memory leak in amd_pmc_stb_debugfs_open_v2()

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-30 · updated 2026-06-17

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.

Affected products

Linux kernel: 6.3 — fixed in 6.4

How to fix

Upgrade to a fixed version: Linux kernel 6.4. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/d804adef7b23b22bb82e1b3dd113e9073cea9bc1
https://git.kernel.org/stable/c/f6e7ac4c35a28aef0be93b32c533ae678ad0b9e7

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