CVEvulnerability

CVE-2025-38177

5.5 MEDIUM Published 2025-07-04 Modified 2026-07-30 Official page ↗
Status
Modified
Published
2025-07-04
Last modified
2026-07-30
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-459

Description

In the Linux kernel, the following vulnerability has been resolved: sch_hfsc: make hfsc_qlen_notify() idempotent hfsc_qlen_notify() is not idempotent either and not friendly to its callers, like fq_codel_dequeue(). Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life: 1. update_vf() decreases cl->cl_nactive, so we can check whether it is non-zero before calling it. 2. eltree_remove() always removes RB node cl->el_node, but we can use RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.

Affected configurations

• linux linux kernel (< 5.4.297) • linux linux kernel (>= 5.5 < 5.10.241) • linux linux kernel (>= 5.11 < 5.15.190) • linux linux kernel (>= 5.16 < 6.1.138) • linux linux kernel (>= 6.2 < 6.6.90) • linux linux kernel (>= 6.7 < 6.12.28) • linux linux kernel (>= 6.13 < 6.14.6) • linux linux kernel 6.15 • debian debian linux 11.0

Related

Weakness · CWE (1)

  • CWE-459 Incomplete Cleanup weakness

References