net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag

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Summary

CVECVE-2026-23105
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-04 17:16:21 UTC
Updated2026-04-03 14:16:23 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net/sched: qfq: Use cl_is_active to determine whether class is active in qfq_rm_from_ag This is more of a preventive patch to make the code more consistent and to prevent possible exploits that employ child qlen manipulations on qfq. use cl_is_active instead of relying on the child qdisc's qlen to determine class activation.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd fac2c67bb2bb732eae4283e45fc338af7e08c254 git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd b8c24cf5268fb3bfb8d16324c3dbb985f698c835 git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd f27047abf7cac1b6f90c3ad60de21ef9f717c26d git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd 93b8635974fb050c43d07e35e5edfe6e685ca28a git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd abd9fc26ea577561a5ef6241a1b058755ffdad0c git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd 77f1afd0bb4d5da95236f6114e6d0dfcde187ff6 git Not specified
CNA Linux Linux affected 462dbc9101acd38e92eda93c0726857517a24bbd d837fbee92453fbb829f950c8e7cf76207d73f33 git Not specified
CNA Linux Linux affected 3.8 Not specified
CNA Linux Linux unaffected 3.8 semver Not specified
CNA Linux Linux unaffected 5.10.249 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.199 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.162 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.122 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.68 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.8 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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