CVE-2026-74389
Description
A flaw was found in the Linux kernel's RDMA/hns component. When the hardware experiences an abnormality, the hns_roce_cmd_mbox() command interface can fail. This failure leads to an uncontrolled flood of error messages, which can consume system resources and ultimately cause a system crash, resulting in a Denial of Service (DoS).
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
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU); DoS: Resource Consumption (Other)
Log files can become so large that they consume excessive resources, such as disk and CPU, which can hinder the performance of the system.
Non-Repudiation
Technical Impact: Hide Activities
Logging too much information can make the log files of less use to forensics analysts and developers when trying to diagnose a problem or recover from an attack.
Non-Repudiation
Technical Impact: Hide Activities
If system administrators are unable to effectively process log files, attempted attacks may go undetected, possibly leading to eventual system compromise.
Frequently Asked Questions
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