CVE-2025-71142

Kernel warning via stale cpuset partition state

Published Jan 14, 2026 · Updated Jan 14, 2026

Incorrect state handling in the cpuset component of affected Linux Kernel releases allows local users to trigger a kernel warning. During CPU hotplug, cpuset_hotplug_update_tasks fails to invalidate partitions when subpartitions_cpus becomes empty, so remote_partition_disable tests effective_xcpus against an already-cleared mask. Reachability requires privileges to alter cgroup v2 cpuset partitions and offline a CPU; the demonstrated result is a warning and incorrect partition-validity reporting.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect state handling in the cpuset component of affected Linux Kernel releases allows local users to trigger a kernel warning. During CPU hotplug, cpuset_hotplug_update_tasks fails to invalidate partitions when subpartitions_cpus becomes empty, so remote_partition_disable tests effective_xcpus against an already-cleared mask. Reachability requires privileges to alter cgroup v2 cpuset partitions and offline a CPU; the demonstrated result is a warning and incorrect partition-validity reporting.

The record

CVE
CVE-2025-71142
Published
Jan 14, 2026
Updated
Jan 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.15
  2. Affected versionversion=f62a5d39368e34a966c8df63e1f05eed7fe9c5de <5d8b9d38a7676be7bb5e7d57f92156a98dab39fb
  3. Affected versionversion=f62a5d39368e34a966c8df63e1f05eed7fe9c5de <aa7d3a56a20f07978d9f401e13637a6479b13bd0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.15; version=f62a5d39368e34a966c8df63e1f05eed7fe9c5de <5d8b9d38a7676be7bb5e7d57f92156a98dab39fb; version=f62a5d39368e34a966c8df63e1f05eed7fe9c5de <aa7d3a56a20f07978d9f401e13637a6479b13bd0

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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