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kernel: net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit

🗓️ 21 Apr 2026 13:08:50Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 6 Views

Make cake_enqueue return NET_XMIT_CN when past buffer_limit to signal congestion to htb_enqueue.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.1aarch64kernel6.12.0-124.52.1.el10_1kernel-6.12.0-124.52.1.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1ppc64lekernel6.12.0-124.52.1.el10_1kernel-6.12.0-124.52.1.el10_1.ppc64le.rpm
Red Hat Enterprise Linux10.1s390xkernel6.12.0-124.52.1.el10_1kernel-6.12.0-124.52.1.el10_1.s390x.rpm
Red Hat Enterprise Linux10.1x86_64kernel6.12.0-124.52.1.el10_1kernel-6.12.0-124.52.1.el10_1.x86_64.rpm
Red Hat Enterprise Linux10.1aarch64kernel-64k6.12.0-124.52.1.el10_1kernel-64k-6.12.0-124.52.1.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1aarch64kernel-64k-core6.12.0-124.52.1.el10_1kernel-64k-core-6.12.0-124.52.1.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1aarch64kernel-64k-debug6.12.0-124.52.1.el10_1kernel-64k-debug-6.12.0-124.52.1.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1aarch64kernel-64k-debug-core6.12.0-124.52.1.el10_1kernel-64k-debug-core-6.12.0-124.52.1.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1aarch64kernel-64k-debug-debuginfo6.12.0-124.52.1.el10_1kernel-64k-debug-debuginfo-6.12.0-124.52.1.el10_1.aarch64.rpm
Red Hat Enterprise Linux10.1aarch64kernel-64k-debug-devel6.12.0-124.52.1.el10_1kernel-64k-debug-devel-6.12.0-124.52.1.el10_1.aarch64.rpm
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30 Jun 2026 01:59Current
5.6Medium risk
Vulners AI Score5.6
CVSS 3.17.8
EPSS0.00168
SSVC
CWE-390
kernel net schedulingcake enqueuenet xmit congestionbuffer limitpacket drophtb activationack filtering
6