In the Linux kernel, the following vulnerability has been resolved:
netfilter: synproxy: add mutex to guard hook reference counting
As the synproxy infrastructure register netfilter hooks on-demand when a user adds the first iptables target or nftables expression, if done concurrently they can race each other.
Introduce a mutex to serialize the refcount control blocks access from both frontends. While a per namespace mutex might be more efficient, it is not needed for target/expression like SYNPROXY.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-5.15.210-148.245Upgrade kernelUpgrade kernel-develUpgrade kernel-livepatch-5.10.259-258.1043Upgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade kernel-headersUpgrade perf-debuginfoUpgrade perfUpgrade python-perfUpgrade python-perf-debuginfoUpgrade kernel-tools | Jul 8, 2026 | Jul 8, 2026 |
| Amazon_linux_2023 | — | Upgrade bpftool-debuginfoUpgrade kernel6.18-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel6.12-modules-extra-commonUpgrade kernel-debuginfoUpgrade perf6.18Upgrade microvm-kernel6.18Upgrade python3-perf6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-debuginfoUpgrade python3-perf6.18Upgrade bpftool6.18Upgrade kernel6.18-tools-develUpgrade kernel-headersUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-toolsUpgrade kernel6.18-modules-extra-commonUpgrade python3-perf6.18-debuginfoUpgrade kernel-modules-extra-commonUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-livepatch-6.18.36-69.134Upgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.18-develUpgrade kernelUpgrade perf6.12Upgrade kernel-livepatch-6.12.94-123.174Upgrade python3-perf-debuginfoUpgrade kernel6.12-headersUpgrade kernel6.12-tools-debuginfoUpgrade bpftoolUpgrade kernel-tools-develUpgrade kernel6.18-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-toolsUpgrade perfUpgrade kernel6.12Upgrade kernel6.12-develUpgrade python3-perf6.12Upgrade bpftool6.12-debuginfoUpgrade kernel-develUpgrade kernel6.12-modules-extraUpgrade kernel-modules-extraUpgrade bpftool6.12Upgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.18Upgrade kernel-livepatch-6.1.176-220.358Upgrade perf6.18-debuginfoUpgrade perf6.12-debuginfoUpgrade kernel6.18-headersUpgrade bpftool6.18-debuginfoUpgrade kernel6.18-toolsUpgrade kernel6.18-modules-extraUpgrade python3-perfUpgrade perf-debuginfo | Jul 8, 2026 | Jun 25, 2026 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Jul 5, 2026 | Jul 5, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Jun 25, 2026 |
| Ubuntu | — | Upgrade linux-image-kvmUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-oem-26.04bUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-raspi-7.0Upgrade linux-image-virtual-5.15Upgrade linux-image-5.15.0-1109-kvmUpgrade linux-image-5.15.0-1111-ibmUpgrade linux-image-5.15.0-1117-awsUpgrade linux-image-6.8.0-1035-nvidia-tegraUpgrade linux-image-7.0.0-1013-ibmUpgrade linux-image-azure-cvmUpgrade linux-image-generic-lpaeUpgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-7.0.0-2018-nvidia-bos-64kUpgrade linux-image-generic-5.15Upgrade linux-image-gkeop-5.15Upgrade linux-image-azure-fipsUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-nvidia-7.0Upgrade linux-image-virtual-7.0Upgrade linux-image-realtime-7.0Upgrade linux-image-5.15.0-1100-gkeopUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-5.15.0-1123-azure-fipsUpgrade linux-image-oracleUpgrade linux-image-realtimeUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-7.0.0-1012-aws-64kUpgrade linux-image-7.0.0-1014-azureUpgrade linux-image-7.0.0-1018-nvidiaUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-azure-lts-26.04Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-realtime-64kUpgrade linux-image-generic-64k-5.15Upgrade linux-image-awsUpgrade linux-image-gcp-5.15Upgrade linux-image-7.0.0-1006-gkeUpgrade linux-image-azure-fdeUpgrade linux-image-gke-64kUpgrade linux-image-aws-5.15Upgrade linux-image-generic-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-azure-fde-5.15Upgrade linux-image-5.15.0-1080-xilinx-zynqmpUpgrade linux-image-gcp-7.0Upgrade linux-image-aws-lts-22.04Upgrade linux-image-fipsUpgrade linux-image-aws-7.0Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-aws-fips-5.15Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-gke-7.0Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-gcp-fipsUpgrade linux-image-virtualUpgrade linux-image-5.15.0-195-lowlatencyUpgrade linux-image-aws-64k-7.0Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-7.0.0-31-realtimeUpgrade linux-image-5.15.0-198-generic-64kUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-ibm-5.15Upgrade linux-image-realtime-64k-7.0Upgrade linux-image-aws-64k-5.15Upgrade linux-image-aws-fipsUpgrade linux-image-azure-5.15Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-5.15.0-1116-realtimeUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-5.15.0-1112-intel-iotgUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-oem-26.04aUpgrade linux-image-realtime-hwe-26.04Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-gkeopUpgrade linux-image-gkeUpgrade linux-image-7.0.0-31-generic-64kUpgrade linux-image-7.0.0-1013-oemUpgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-5.15.0-1118-gcpUpgrade linux-image-5.15.0-1114-oracleUpgrade linux-image-5.15.0-195-lowlatency-64kUpgrade linux-image-raspiUpgrade linux-image-7.0.0-2018-nvidia-bosUpgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-oem-20.04cUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-azureUpgrade linux-image-aws-64kUpgrade linux-image-7.0.0-31-genericUpgrade linux-image-generic-lpae-5.15Upgrade linux-image-7.0.0-1012-awsUpgrade linux-image-oem-26.04Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-oracle-5.15Upgrade linux-image-oracle-7.0Upgrade linux-image-gke-5.15Upgrade linux-image-5.15.0-1113-gkeUpgrade linux-image-oem-20.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-lowlatency-5.15Upgrade linux-image-azure-lts-22.04Upgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-azure-7.0Upgrade linux-image-7.0.0-1019-raspi-realtimeUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-genericUpgrade linux-image-intelUpgrade linux-image-gke-64k-7.0Upgrade linux-image-generic-hwe-20.04Upgrade linux-image-fips-5.15Upgrade linux-image-7.0.0-1018-nvidia-64kUpgrade linux-image-6.8.0-1035-nvidia-tegra-rtUpgrade linux-image-5.15.0-198-genericUpgrade linux-image-5.15.0-1122-azure-fdeUpgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-oracle-64kUpgrade linux-image-oem-20.04dUpgrade linux-image-5.15.0-1118-gcp-fipsUpgrade linux-image-5.15.0-1109-intel-iot-realtimeUpgrade linux-image-5.15.0-198-fipsUpgrade linux-image-generic-64k-7.0Upgrade linux-image-7.0.0-31-realtime-64kUpgrade linux-image-ibmUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-azure-fips-5.15Upgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-5.15.0-1123-azureUpgrade linux-image-5.15.0-1117-aws-fipsUpgrade linux-image-5.15.0-1117-aws-64kUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-5.15.0-198-generic-lpaeUpgrade linux-image-realtime-5.15Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-intel-iotgUpgrade linux-image-oem-20.04bUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-generic-64kUpgrade linux-image-gcpUpgrade linux-image-oem-7.0Upgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-64kUpgrade linux-image-7.0.0-1019-raspiUpgrade linux-image-7.0.0-1006-gke-64kUpgrade linux-image-nvidiaUpgrade linux-image-lowlatency-64kUpgrade linux-image-lowlatencyUpgrade linux-image-kvm-5.15Upgrade linux-image-ibm-7.0 | Sep 14, 2026 | Sep 7, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 10, 2026 | Jun 25, 2026 |
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