In the Linux kernel, the following vulnerability has been resolved:
net/sched: fix packet loop on netem when duplicate is on
When netem duplicates a packet it re-enqueues the copy at the root qdisc. If another netem sits in the tree the copy can be duplicated again, recursing until the stack or memory is exhausted.
The original duplication guard temporarily zeroed q->duplicate around the re-enqueue, but that does not cover all cases because it is per-qdisc state shared across all concurrent enqueue paths and is not safe without additional locking.
Use the skb tc_depth field introduced in an earlier patch: - increment it on the duplicate before re-enqueue - skip duplication for any skb whose tc_depth is already non-zero.
This marks the packet itself rather than mutating qdisc state, therefore it is safe regardless of tree topology or concurrency.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12-toolsUpgrade kernel6.12-develUpgrade kernel6.12-tools-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel6.12-headersUpgrade python3-perf6.12Upgrade kernel6.12-debuginfo-common-x86_64Upgrade bpftool6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-debuginfoUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-modules-extra-commonUpgrade python3-perf6.12-debuginfoUpgrade kernel6.12Upgrade perf6.12Upgrade kernel-livepatch-6.12.94-123.174Upgrade kernel6.12-tools-develUpgrade kernel6.12-modules-extra | Aug 10, 2026 | Jul 19, 2026 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 23, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-nvidia-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-awsUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-7.0.0-1014-azureUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-oracle-64kUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-azureUpgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-gcpUpgrade linux-image-nvidia-bosUpgrade linux-image-raspiUpgrade linux-image-gcp-64kUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-nvidia-7.0Upgrade linux-image-raspi-7.0Upgrade linux-image-azure-7.0Upgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-7.0.0-1009-awsUpgrade linux-image-azure-fde-7.0Upgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-oracle-7.0Upgrade linux-image-7.0.0-1010-azureUpgrade linux-image-gcp-7.0Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-ibm-7.0Upgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-azure-fdeUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-aws-64kUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-oracleUpgrade linux-image-ibmUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-nvidiaUpgrade linux-image-aws-64k-7.0 | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 3, 2026 | Jul 19, 2026 |
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