CVE-2023-54267
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.
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).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 2.5 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | High | N/A | N/A |
| Privileges Required | Low | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | Low | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Understanding the Weakness (CWE)
Integrity,Confidentiality,Other
Technical Impact: Modify Memory; Read Memory; Modify Application Data; Read Application Data; Alter Execution Logic
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