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

codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()

After making all ->qlen_notify() callbacks idempotent, now it is safe to
remove the check of qlen!=0 from both fq_codel_dequeue() and
codel_qdisc_dequeue().
Advisories
Source ID Title
Debian DLA Debian DLA DLA-4193-1 linux-6.1 security update
Debian DLA Debian DLA DLA-4327-1 linux security update
EUVD EUVD EUVD-2025-13244 In the Linux kernel, the following vulnerability has been resolved: codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() After making all ->qlen_notify() callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fq_codel_dequeue() and codel_qdisc_dequeue().
Ubuntu USN Ubuntu USN USN-7594-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7594-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7594-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7607-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7607-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7607-3 Linux kernel (KVM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-3 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-4 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-5 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-6 Linux kernel (Xilinx ZynqMP) vulnerabilities
Ubuntu USN Ubuntu USN USN-7608-7 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-2 Linux kernel (Real-time) vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-3 Linux kernel (IBM) vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-4 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7609-5 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7610-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7610-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7610-3 Linux kernel (Low Latency) vulnerabilities
Ubuntu USN Ubuntu USN USN-7627-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7627-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7628-1 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7653-1 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7655-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-7671-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7671-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7671-3 Linux kernel (IoT) vulnerabilities
Ubuntu USN Ubuntu USN USN-7686-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-7712-1 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7712-2 Linux kernel (Azure) vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 06 Nov 2025 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Debian
Debian debian Linux
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
Vendors & Products Debian
Debian debian Linux
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Mon, 03 Nov 2025 20:30:00 +0000

Type Values Removed Values Added
References

Mon, 03 Nov 2025 18:30:00 +0000

Type Values Removed Values Added
References

Thu, 28 Aug 2025 14:45:00 +0000


Wed, 18 Jun 2025 16:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20

Mon, 05 May 2025 14:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate


Fri, 02 May 2025 14:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog() After making all ->qlen_notify() callbacks idempotent, now it is safe to remove the check of qlen!=0 from both fq_codel_dequeue() and codel_qdisc_dequeue().
Title codel: remove sch->q.qlen check before qdisc_tree_reduce_backlog()
References

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-11-03T19:55:29.865Z

Reserved: 2025-04-16T04:51:23.941Z

Link: CVE-2025-37798

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2025-05-02T15:15:48.657

Modified: 2025-11-06T20:49:48.530

Link: CVE-2025-37798

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-05-02T00:00:00Z

Links: CVE-2025-37798 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-06-23T19:32:00Z