CVE-2025-38177

Aliases:UBUNTU-CVE-2025-38177DEBIAN-CVE-2025-38177
Advisory lineage Upstream: 0 Downstream: 101
Modified
Published: 04 Jul 2025, 12:47
Last modified:05 Aug 2026, 12:00

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.17% LOW
0% probability +0.14%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Jul 2025, 12:47
Published
Vulnerability first disclosed
05 Aug 2026, 12:00
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v4.0•HIGH•Score: 7.3CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.17%• Percentile: 6%

Techniques & Countermeasures

  • CWE-459•Incomplete Cleanup

    The product does not properly "clean up" and remove temporary or supporting resources after they have been used.

Affected Systems

  • debian•linux

    < 5.10.244-1 | < 6.1.139-1 | < 6.12.29-1 | < 6.12.29-1

  • debian•linux-6.1

    < 6.1.140-1~deb11u1

  • ubuntu•linux

    all | < 4.4.0-270.304 | < 4.15.0-239.251 | < 5.4.0-219.239 | < 5.15.0-143.153 | < 6.8.0-63.66

  • ubuntu•linux-allwinner-5.19

    all

  • ubuntu•linux-aws

    < 4.4.0-1145.151 | < 4.4.0-1183.198 | < 4.15.0-1182.195 | < 5.4.0-1148.158 | < 5.15.0-1087.94 | < 6.8.0-1031.33

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.11

    all

  • ubuntu•linux-aws-5.13

    all

  • ubuntu•linux-aws-5.15

    < 5.15.0-1087.94~20.04.1

  • ubuntu•linux-aws-5.19

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1148.158~18.04.1

  • ubuntu•linux-aws-5.8

    all

  • ubuntu•linux-aws-6.14

    < 6.14.0-1009.9~24.04.1

  • ubuntu•linux-aws-6.2

    all

  • ubuntu•linux-aws-6.5

    all

  • ubuntu•linux-aws-6.8

    < 6.8.0-1031.33~22.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2120.126 | all | < 5.4.0-1148.158+fips1 | < 5.15.0-1087.94+fips1

  • ubuntu•linux-aws-hwe

    < 4.15.0-1182.195~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1190.205~14.04.1 | < 4.15.0-1190.205~16.04.1 | all | < 5.4.0-1153.160 | < 5.15.0-1092.101 | < 6.8.0-1031.36

  • ubuntu•linux-azure-4.15

    < 4.15.0-1190.205

  • ubuntu•linux-azure-5.11

    all

  • ubuntu•linux-azure-5.13

    all

  • ubuntu•linux-azure-5.15

    < 5.15.0-1094.103~20.04.1

  • ubuntu•linux-azure-5.19

    all

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1153.160~18.04.1

  • ubuntu•linux-azure-5.8

    all

  • ubuntu•linux-azure-6.11

    all

  • ubuntu•linux-azure-6.2

    all

  • ubuntu•linux-azure-6.5

    all

  • ubuntu•linux-azure-6.8

    < 6.8.0-1031.36~22.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fde

    all | all | all

  • ubuntu•linux-azure-fde-5.15

    < 5.15.0-1114.123~20.04.1

  • ubuntu•linux-azure-fde-5.19

    all

  • ubuntu•linux-azure-fde-6.2

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2099.105 | all | < 5.4.0-1154.161+fips1 | < 5.15.0-1094.103+fips1

  • ubuntu•linux-azure-nvidia

    < 6.8.0-1019.20

  • ubuntu•linux-bluefield

    all | < 5.4.0-1107.114 | < 5.15.0-1070.72

  • ubuntu•linux-fips

    < 4.4.0-1115.122 | < 4.15.0-1137.148 | all | < 5.4.0-1122.132 | < 5.15.0-143.153+fips1 | < 6.8.0-78.78+fips1

  • ubuntu•linux-gcp

    < 4.15.0-1175.192~16.04.1 | all | < 5.4.0-1151.160 | < 5.15.0-1086.95 | < 6.8.0-1032.34

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1175.192

  • ubuntu•linux-gcp-5.11

    all

  • ubuntu•linux-gcp-5.13

    all

  • ubuntu•linux-gcp-5.15

    < 5.15.0-1086.95~20.04.1

  • ubuntu•linux-gcp-5.19

    all

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1151.160~18.04.1

  • ubuntu•linux-gcp-5.8

    all

Showing first 50 affected entries in server-rendered view.

References (23)