CVE-2025-71142
Description
A kernel warning was found in the Linux kernel's cpuset cgroup implementation. When a CPU is offlined and this causes subpartitions_cpus to be cleared (no CPUs available for top_cpuset), subsequently disabling a remote partition triggers a spurious warning in remote_partition_disable(). The warning incorrectly fires because effective_xcpus is not a subset of the now-empty subpartitions_cpus.
Statement
This issue affects systems using cpuset cgroup partitions combined with CPU hotplug operations. The specific sequence requires creating exclusive CPU partitions, offlining a CPU that affects partition validity, and then changing the partition type. The result is a kernel warning in the log, but no crash or data corruption occurs. Root privileges are required to modify cgroup configurations.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Other
Technical Impact: Alter Execution Logic
This weakness can cause unintended logic to be executed and other unexpected application behavior.
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