CVE-2026-53086
Description
A flaw was found in the Linux kernel's bcmgenet network driver. This vulnerability arises from an overly aggressive timeout handler that attempts to reset all network transmission queues when only one experiences an issue. This behavior can create race conditions, potentially leading to system instability or a denial of service, where network services become unavailable.
Statement
This vulnerability is rated as Moderate severity rather than Important because exploitation is limited to a local denial of service and requires specialized Broadcom network hardware. The issue only affects systems utilizing the Broadcom GENET Ethernet controller, which is primarily present on select ARM and embedded platforms rather than standard enterprise server deployments. A local unprivileged user could trigger transmit timeout contention to cause network disruption or kernel instability, without impacting system confidentiality or data integrity.
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 | 9.8 |
| Attack Vector | Local | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | None |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | None | N/A | High |
| Integrity Impact | None | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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