CVE-2026-74272
Description
A flaw was found in the Linux kernel's cxl/region module. Multiple race conditions exist during the deletion of CXL (Compute Express Link) regions. A local attacker could exploit these race conditions by repeatedly attempting to delete a region via the sysfs interface or by racing with kernel operations. This could lead to a denial of service (DoS) by preventing proper resource cleanup and potentially causing system instability.
Statement
This vulnerability is evaluated with a Moderate severity impact because exploitation is constrained to local users with access to sysfs device teardown interfaces on systems equipped with Compute Express Link (CXL) technology. Systems without physical CXL hardware or emulated CXL devices are not exposed to this issue during normal operation. Furthermore, the consequence is limited to kernel resource mismanagement causing a system crash, without compromising data confidentiality or system integrity.
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
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