In the Linux kernel, the following vulnerability has been resolved:
netfilter: bridge: release template ct on non-IP path
A bridge nftables ct zone set rule can attach a conntrack template to an skb before nf_ct_bridge_pre() sees it. For non-IPv4 and non-IPv6 EtherTypes, nf_ct_bridge_pre() currently overwrites skb->_nfct with IP_CT_UNTRACKED without releasing the existing template reference.
That makes the per-cpu template, and any temporary templates allocated for concurrent use, unreachable and leaks memory until the host runs out of slab.
Reset the skb conntrack state before marking the frame untracked so the existing template reference is dropped on the non-IP path.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.12Upgrade linux | Aug 26, 2026 | Aug 26, 2026 |
| Redhat_linux | — | No solution exists | Aug 25, 2026 | Aug 22, 2026 |
| Ubuntu | — | Upgrade linux-image-5.15.0-1117-awsUpgrade linux-image-gke-5.15Upgrade linux-image-lowlatency-64kUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-generic-64k-5.15Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-gcp-5.15Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-genericUpgrade linux-image-generic-5.15Upgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-1100-gkeopUpgrade linux-image-oracleUpgrade linux-image-lowlatencyUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-azure-fips-5.15Upgrade linux-image-fipsUpgrade linux-image-gcp-fipsUpgrade linux-image-azure-cvmUpgrade linux-image-5.15.0-1109-kvmUpgrade linux-image-aws-fips-5.15Upgrade linux-image-realtimeUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-5.15.0-1117-aws-fipsUpgrade linux-image-5.15.0-1113-gkeUpgrade linux-image-awsUpgrade linux-image-azure-fdeUpgrade linux-image-generic-lpaeUpgrade linux-image-5.15.0-1123-azure-fipsUpgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-5.15.0-1080-xilinx-zynqmpUpgrade linux-image-oem-20.04bUpgrade linux-image-5.15.0-195-lowlatencyUpgrade linux-image-5.15.0-1111-ibmUpgrade linux-image-aws-64k-5.15Upgrade linux-image-ibmUpgrade linux-image-5.15.0-1116-realtimeUpgrade linux-image-nvidiaUpgrade linux-image-oracle-5.15Upgrade linux-image-5.15.0-1112-intel-iotgUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-ibm-5.15Upgrade linux-image-5.15.0-198-generic-64kUpgrade linux-image-5.15.0-198-generic-lpaeUpgrade linux-image-5.15.0-1109-intel-iot-realtimeUpgrade linux-image-aws-fipsUpgrade linux-image-azure-fde-5.15Upgrade linux-image-5.15.0-1112-nvidiaUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-lowlatency-5.15Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-5.15.0-1123-azureUpgrade linux-image-5.15.0-1118-gcp-fipsUpgrade linux-image-intel-iotgUpgrade linux-image-virtual-5.15Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-kvmUpgrade linux-image-gcpUpgrade linux-image-oem-20.04dUpgrade linux-image-5.15.0-198-genericUpgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-6.8.0-1036-nvidia-tegraUpgrade linux-image-5.15.0-1112-nvidia-lowlatencyUpgrade linux-image-5.15.0-198-fipsUpgrade linux-image-5.15.0-1118-gcpUpgrade linux-image-5.15.0-1114-oracleUpgrade linux-image-virtualUpgrade linux-image-5.15.0-1122-azure-fdeUpgrade linux-image-5.15.0-195-lowlatency-64kUpgrade linux-image-5.15.0-1117-aws-64kUpgrade linux-image-realtime-5.15Upgrade linux-image-oem-20.04cUpgrade linux-image-kvm-5.15Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-fips-5.15Upgrade linux-image-gkeopUpgrade linux-image-generic-64kUpgrade linux-image-nvidia-5.15Upgrade linux-image-intelUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-aws-5.15Upgrade linux-image-oem-20.04Upgrade linux-image-generic-hwe-20.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-nvidia-tegraUpgrade linux-image-6.8.0-1036-nvidia-tegra-rtUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-azure-fipsUpgrade linux-image-azureUpgrade linux-image-gke | Oct 6, 2026 | Oct 6, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 15, 2026 | Aug 22, 2026 |
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