CVE-2026-43467
Description
A flaw was found in the Linux kernel's mlx5_core driver. A local user or process can trigger a system crash by attempting to move a network device to switchdev mode when the device does not support IPsec. This occurs because the kernel incorrectly tries to clean up IPsec resources that do not exist, leading to a Denial of Service (DoS).
Statement
This vulnerability is rated as Moderate impact for Red Hat Enterprise Linux because triggering the condition requires local privileges to alter device modes and results solely in a denial of service. The issue specifically manifests when reconfiguring Mellanox network adapters that lack IPsec support into switchdev operational mode. As this mode transition is an administrative operation rather than an automatic network-facing behavior, standard environments remain unaffected unless explicitly managed in this state.
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 | 5.5 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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