CVE-2025-38177

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

04/07/2025

Last modified:

18/12/2025

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&#39;s make it idempotent to ease qdisc_tree_reduce_backlog() callers&#39; 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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

5.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::		5.4.297 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.241 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.190 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.138 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.90 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.28 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.14.6 (excluding)
cpe:2.3:o:linux:linux_kernel:6.15:rc1::::::
cpe:2.3:o:debian:debian_linux:11.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-38177

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools