CVE-2025-38457
kernel: Linux kernel: Denial of Service due to invalid queueing discipline (qdisc) parent class handling
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 25, 2025
Updated · June 30, 2026
Description
A flaw was found in the Linux kernel. A local user with administrative privileges can exploit a vulnerability in the queueing discipline (qdisc) API. This occurs when a user attempts to create or modify a qdisc by specifying a parent that does not correspond to a valid class, leading to an unconditional invocation of a child qdisc's notification function with invalid parameters. This can cause a system crash, resulting in a Denial of Service (DoS).
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference