CVE-2026-80912
Description
A flaw was found in the Linux kernel's SELinux subsystem. When processing security class values, the security_get_classes() function could return a null pointer if a class value was not properly defined by the security policy. This could lead to a null pointer dereference, potentially causing a system crash or denial of service.
Statement
This vulnerability is rated as having a Low severity because triggering the issue requires loading a malformed or non-conforming policy, which demands elevated administrative privileges. Default SELinux policies provided across Red Hat Enterprise Linux are fully conforming and define every declared class, meaning standard deployments are not exposed. As a result, the flaw cannot be exploited in typical production configurations without an administrator intentionally installing an invalid custom policy.
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
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