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CVE-2026-53121amd-pstate: Fix memory leak in amd_pstate_epp_cpu_init()

Description

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).

Timeline

  1. ID reserved

    By Linux

  2. · 15 days later

    Published

  3. · 5 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-53121, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.16% · top 95% of all CVEs (14 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Affected products

  • Linux · Linux

    • affected f9a378ff6443cdcd4387e5dbb76fa5fa549a83ec – < 539aabbab190825c77eb455ec35652cb3720625f
    • affected f9a378ff6443cdcd4387e5dbb76fa5fa549a83ec – < 7f9aa2359742eaa6ea65ec0d20dafdfd0add9b8b
    • affected f9a378ff6443cdcd4387e5dbb76fa5fa549a83ec – < beda3b363546a423e4e29a7395e04c0ac4ff677e

  • Linux · Linux

    • affected 6.14
    • unaffected < 6.14
    • unaffected 6.18.33 – ≤ 6.18.*
    • unaffected 7.0.10 – ≤ 7.0.*
    • unaffected 7.1 – ≤ *

References

References3

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .