VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

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

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in beda3b363546a423e4e29a7395e04c0ac4ff677e : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in beda3b363546a423e4e29a7395e04c0ac4ff677e, 539aabbab190825c77eb455ec35652cb3720625f, 7f9aa2359742eaa6ea65ec0d20dafdfd0add9b8b

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to beda3b363546a423e4e29a7395e04c0ac4ff677e, 539aabbab190825c77eb455ec35652cb3720625f or 7f9aa2359742eaa6ea65ec0d20dafdfd0add9b8b.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ f9a378ff6443cdcd4387e5dbb76fa5fa549a83ec, < beda3b363546a423e4e29a7395e04c0ac4ff677e	Fixed in beda3b363546a423e4e29a7395e04c0ac4ff677e
LinuxLinux	Affected ≥ f9a378ff6443cdcd4387e5dbb76fa5fa549a83ec, < 539aabbab190825c77eb455ec35652cb3720625f	Fixed in 539aabbab190825c77eb455ec35652cb3720625f
LinuxLinux	Affected ≥ f9a378ff6443cdcd4387e5dbb76fa5fa549a83ec, < 7f9aa2359742eaa6ea65ec0d20dafdfd0add9b8b	Fixed in 7f9aa2359742eaa6ea65ec0d20dafdfd0add9b8b
LinuxLinux	Affected =6.14	Fixed in–

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).

References

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