High severity7.8NVD Advisory· Published Feb 4, 2026· Updated Apr 3, 2026
CVE-2026-23105
CVE-2026-23105
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
85cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 7 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=3.8,<5.10.249
- cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*
- (no CPE)
- osv-coords77 versionspkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP7pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-SLE15-SP7-RT_Update_10&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-livepatch-SLE15-SP7_Update_10&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_78&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 6.12.0-160000.27.1+ 76 more
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1.160000.2.8
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.4.0-150700.53.34.1.150700.17.23.1
- (no CPE)range: < 6.12.0-160000.27.1.160000.2.8
- (no CPE)range: < 6.12.0-160000.27.1.160000.2.8
- (no CPE)range: < 6.4.0-40.1.21.17
- (no CPE)range: < 6.4.0-40.1.21.17
- (no CPE)range: < 6.12.0-160000.27.1.160000.2.8
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 4.12.14-122.296.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 4.12.14-122.296.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 4.12.14-122.296.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 1-150700.1.3.1
- (no CPE)range: < 1-150700.15.3.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.4.0-150700.7.34.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 4.12.14-122.296.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 4.12.14-122.296.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-150700.7.34.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 4.12.14-122.296.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 4.12.14-122.296.1
- (no CPE)range: < 6.4.0-150700.7.34.1
- (no CPE)range: < 6.4.0-150700.53.34.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 6.12.0-160000.27.1
- (no CPE)range: < 1-8.3.1
Patches
Vulnerability mechanics
References
7- git.kernel.org/stable/c/77f1afd0bb4d5da95236f6114e6d0dfcde187ff6nvdPatch
- git.kernel.org/stable/c/93b8635974fb050c43d07e35e5edfe6e685ca28anvdPatch
- git.kernel.org/stable/c/abd9fc26ea577561a5ef6241a1b058755ffdad0cnvdPatch
- git.kernel.org/stable/c/b8c24cf5268fb3bfb8d16324c3dbb985f698c835nvdPatch
- git.kernel.org/stable/c/d837fbee92453fbb829f950c8e7cf76207d73f33nvdPatch
- git.kernel.org/stable/c/f27047abf7cac1b6f90c3ad60de21ef9f717c26dnvdPatch
- git.kernel.org/stable/c/fac2c67bb2bb732eae4283e45fc338af7e08c254nvdPatch
News mentions
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