CVE-2026-90053

kernel: net/sched: sch_htb: limit htb_classify inner-class filter hops

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 13, 2026

Description

A flaw was found in the Linux kernel's Hierarchical Token Bucket (HTB) scheduler. An unprivileged local user, by sending a specially crafted network packet, can trigger an infinite loop in the packet classification path. This can cause the system to soft lockup or panic, 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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')