In the Linux kernel, the following vulnerability has been resolved:
net/sched: defer qdisc freeing after failed creation
An RTM_NEWQDISC request can make clsact bind a populated shared ingress block during ->init(), publishing an embedded mini_Qdisc to lockless readers. If the same request has an invalid TCA_RATE, estimator setup fails after ->init(); the unwind removes the pointer but synchronously frees its containing qdisc while tc_run() may still hold it.
Retire failed qdiscs through the same RCU helper as normal destruction. Inline the synchronous free into the callback now that no direct callers remain.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel-tools-debuginfoUpgrade python3-perfUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel-livepatch-6.1.189-236.399Upgrade kernel6.12-tools-develUpgrade bpftool-debuginfoUpgrade kernel-modules-extraUpgrade kernelUpgrade python3-perf-debuginfoUpgrade bpftoolUpgrade microvm-kernelUpgrade python3-perf6.12Upgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade kernel6.12-debuginfoUpgrade kernel6.12-headersUpgrade kernel6.12-toolsUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade kernel6.12-develUpgrade perf-debuginfoUpgrade perfUpgrade bpftool6.12Upgrade perf6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade kernel6.12-tools-debuginfoUpgrade kernel-headersUpgrade bpftool6.12-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12-modules-extra-commonUpgrade kernel6.12Upgrade kernel-modules-extra-commonUpgrade kernel6.12-modules-extraUpgrade kernel-livepatch-6.12.111-136.204Upgrade perf6.12-debuginfo | Oct 13, 2026 | Sep 25, 2026 |
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Sep 30, 2026 | Sep 25, 2026 |
| Redhat_linux | — | No solution exists | Sep 30, 2026 | Sep 25, 2026 |
| Ubuntu | — | Upgrade linux-gcpUpgrade linux-hwe-7.0Upgrade linux-oracleUpgrade linux-oem-7.0Upgrade linux-ibmUpgrade linuxUpgrade linux-riscv-7.0Upgrade linux-awsUpgrade linux-riscv | Nov 3, 2026 | Sep 25, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2026 | Sep 25, 2026 |
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