CVE-2026-98587
Description
A flaw was found in the Linux kernel's FireWire subsystem. A local user can trigger a race condition by concurrently releasing a device file descriptor while an asynchronous resource management task is running. This flaw allows a resource state to transition backwards from deallocation to reallocation, leading to inconsistent internal states and a potential Denial of Service (DoS) through a system crash.
Statement
This vulnerability is rated as having Moderate impact because exploitation requires local access, specific timing to win a race condition, and physical or virtual FireWire hardware that is rarely present in standard enterprise server environments. While an unprivileged local user could potentially cause a denial of service through a kernel crash, the issue does not permit arbitrary code execution or privilege escalation. Furthermore, default Red Hat Enterprise Linux installations do not load the FireWire subsystem unless matching hardware controllers are detected.
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 | 4.7 | 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 | High | 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:H
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