VYPR
Unrated severityNVD Advisory· Published May 20, 2025· Updated Jan 2, 2026

sch_htb: make htb_qlen_notify() idempotent

CVE-2025-37932

Description

In the Linux kernel, the following vulnerability has been resolved:

sch_htb: make htb_qlen_notify() idempotent

htb_qlen_notify() always deactivates the HTB class and in fact could trigger a warning if it is already deactivated. Therefore, it is not idempotent and not friendly to its callers, like fq_codel_dequeue().

Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life.

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Affected products

204

Patches

Vulnerability mechanics

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