In the Linux kernel, the following vulnerability has been resolved: amd-pstate: Fix memory leak in amd_pstate_epp_cpu_init() On failure to set the epp, the function amd_pstate_epp_cpu_init() 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).

A flaw was found in the Linux kernel's amd-pstate driver. When the amd_pstate_epp_cpu_init() function fails to set the Energy Performance Preference (EPP), it does not properly free a previously allocated data object. This oversight leads to a memory leak, which could result in resource exhaustion over time and potentially cause a Denial of Service (DoS) condition on the affected system.

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 6 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel Red Hat Enterprise Linux 7 Not affected kernel-rt Red Hat Enterprise Linux 8 Not affected kernel Red Hat Enterprise Linux 8 Not affected kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt https://www.cve.org/CVERecord?id=CVE-2026-53121 https://nvd.nist.gov/vuln/detail/CVE-2026-53121 https://lore.kernel.org/linux-cve-announce/2026062416-CVE-2026-53121-f105@gregkh/T