CVE-2023-54267

kernel: powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT

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Severity

Low

Red Hat Product Security

2.5

CVSS 3.1

Review impact separately from score.

Published · December 30, 2025

Updated · June 30, 2026

Description

A debug warning issue was found in PowerPC pseries code. When DEBUG_PREEMPT is enabled, accessing lppaca_shared_proc() triggers spurious preemption warnings because it uses smp_processor_id() in preemptible context.

Statement

This only produces warnings when CONFIG_DEBUG_PREEMPT is enabled, which is a debug configuration not used in production kernels. The warning itself is harmless as the code logic is correct regardless of which CPU's lppaca is accessed.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 2.5
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-663 · Use of a Non-reentrant Function in a Concurrent Context