CVE-2026-53121: amd-pstate: Fix memory leak in amd_pstate_epp_cpu_init()
In the Linux kernel, the following vulnerability has been resolved:
amd-pstate: Fix memory leak in amdpstateeppcpuinit()
On failure to set the epp, the function amdpstateeppcpuinit() returns with an error code without freeing the cpudata object that was allocated at the beginning of the function.
Ensure that the cpudata object is freed before returning from the function.
This memory leak was discovered by Claude Opus 4.6 with the aid of Chris Mason's AI review-prompts (https://github.com/masoncl/review-prompts/tree/main/kernel).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Linux kernelto a version that resolves this vulnerability.Patch amd-pstate: Fix memory leak in amd_pstate_epp_cpu_init()
Event History
Frequently Asked Questions
What is the severity of CVE-2026-53121?
CVE-2026-53121 has a risk rating of 4.
How do I fix CVE-2026-53121?
To resolve CVE-2026-53121, ensure to update the Linux kernel to the latest patch that fixes the memory leak in amd_pstate_epp_cpu_init().
What systems are affected by CVE-2026-53121?
CVE-2026-53121 affects the Linux kernel specifically related to the amd-pstate components.
What is the impact of CVE-2026-53121?
The impact of CVE-2026-53121 is a memory leak that can lead to increased memory usage over time.
Is CVE-2026-53121 related to CPU performance?
Yes, CVE-2026-53121 is related to AMD's p-state driver, which affects CPU performance and power management.