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Description

In 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.

PUBLISHED Reserved 2026-01-13 | Published 2026-02-04 | Updated 2026-02-09 | Assigner Linux

Product status

Default status
unaffected

462dbc9101acd38e92eda93c0726857517a24bbd (git) before fac2c67bb2bb732eae4283e45fc338af7e08c254
affected

462dbc9101acd38e92eda93c0726857517a24bbd (git) before b8c24cf5268fb3bfb8d16324c3dbb985f698c835
affected

462dbc9101acd38e92eda93c0726857517a24bbd (git) before f27047abf7cac1b6f90c3ad60de21ef9f717c26d
affected

462dbc9101acd38e92eda93c0726857517a24bbd (git) before 93b8635974fb050c43d07e35e5edfe6e685ca28a
affected

462dbc9101acd38e92eda93c0726857517a24bbd (git) before abd9fc26ea577561a5ef6241a1b058755ffdad0c
affected

462dbc9101acd38e92eda93c0726857517a24bbd (git) before 77f1afd0bb4d5da95236f6114e6d0dfcde187ff6
affected

462dbc9101acd38e92eda93c0726857517a24bbd (git) before d837fbee92453fbb829f950c8e7cf76207d73f33
affected

Default status
affected

3.8
affected

Any version before 3.8
unaffected

5.10.249 (semver)
unaffected

5.15.199 (semver)
unaffected

6.1.162 (semver)
unaffected

6.6.122 (semver)
unaffected

6.12.68 (semver)
unaffected

6.18.8 (semver)
unaffected

6.19 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/fac2c67bb2bb732eae4283e45fc338af7e08c254

git.kernel.org/...c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835

git.kernel.org/...c/f27047abf7cac1b6f90c3ad60de21ef9f717c26d

git.kernel.org/...c/93b8635974fb050c43d07e35e5edfe6e685ca28a

git.kernel.org/...c/abd9fc26ea577561a5ef6241a1b058755ffdad0c

git.kernel.org/...c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6

git.kernel.org/...c/d837fbee92453fbb829f950c8e7cf76207d73f33

cve.org (CVE-2026-23105)

nvd.nist.gov (CVE-2026-23105)

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