CVE-2026-93239
Description
A flaw was found in the Linux kernel. A race condition in the ARM64 page-table walk routine occurs when inspecting memory mappings without proper synchronization while interrupts remain enabled. A local user can trigger this flaw during concurrent memory cleanup operations, causing the kernel to access invalid or freed memory. This issue can lead to a system crash, resulting in a Denial of Service (DoS).
Statement
This vulnerability is rated as Moderate impact because exploitation requires local access on 64-bit ARM (aarch64) systems and is restricted to causing a kernel crash (denial of service), with no impact on data confidentiality or integrity. The issue occurs when fault diagnostics inspect task memory mappings while memory cleanup is taking place concurrently. Systems running on other hardware architectures are not affected.
Mitigation
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
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 | N/A | N/A |
| Attack Vector | Local | N/A | N/A |
| Attack Complexity | Low | 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 | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
