CVE-2023-53462

kernel: Linux kernel HSR driver: Denial of Service via uninitialized value access

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · October 1, 2025

Updated · August 5, 2026

Description

A flaw was found in the High-availability Seamless Redundancy (HSR) driver within the Linux kernel. A local user can trigger this vulnerability by sending specific Virtual Local Area Network (VLAN) packets to an HSR interface. This can lead to an uninitialized value being accessed, causing a Denial of Service (DoS) condition for the system.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-824 · Access of Uninitialized Pointer