CVE-2025-68816

kernel: Linux kernel: mlx5 firmware tracer vulnerable to arbitrary memory access or denial of service via malformed format strings

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Severity

Moderate

Red Hat Product Security

5.6

CVSS 3.1

Review impact separately from score.

Published · January 13, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's mlx5 firmware tracer. A malicious or compromised firmware can provide specially crafted format strings to the tracer. Due to insufficient validation of these parameters, this can lead to system crashes, resulting in a Denial of Service (DoS), or potentially allow access to arbitrary memory locations.

Statement

Exploiting this vulnerability requires an attacker to be able to connect a device with maliciously designed firmware to 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 · 5.6
CVSS:3.1/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE-134 · Use of Externally-Controlled Format String