In the Linux kernel, the following vulnerability has been resolved:
tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()
Sashiko found that iptunnel_pmtud_build_icmp() and iptunnel_pmtud_build_icmpv6() were caching ip_hdr() and ipv6_hdr() before an skb_cow() call which can reallocate skb->head.
Fix this possible UAF by initializing the local variables after the skb_cow() call.
Remove skb_reset_network_header() calls which were not needed.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-develUpgrade kernel-debugUpgrade kernel-docUpgrade python3-perfUpgrade kernel-rt-debugUpgrade kernel-rt-coreUpgrade perfUpgrade kernel-tools-libsUpgrade kernel-develUpgrade kernel-coreUpgrade kernel-modules-extraUpgrade kernel-debug-develUpgrade kernel-modulesUpgrade bpftoolUpgrade kernel-rt-debug-modulesUpgrade kernel-debug-coreUpgrade kernel-debug-modulesUpgrade kernel-rt-debug-coreUpgrade kernel-abi-stablelistsUpgrade kernel-rt-modulesUpgrade kernel-zfcpdumpUpgrade kernel-cross-headersUpgrade kernel-toolsUpgrade kernel-zfcpdump-modulesUpgrade kernel-rtUpgrade kernel-debug-modules-extraUpgrade kernel-rt-modules-extraUpgrade kernelUpgrade kernel-zfcpdump-coreUpgrade kernel-tools-libs-develUpgrade kernel-headersUpgrade kernel-zfcpdump-develUpgrade kernel-rt-debug-devel | Oct 11, 2026 | Oct 5, 2026 |
| Amazon Linux Ami 2 | — | Upgrade kernel-toolsUpgrade kernel-develUpgrade kernel-tools-develUpgrade perf-debuginfoUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.15.210-148.245Upgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.10.259-258.1043Upgrade bpftool-debuginfoUpgrade kernel-headersUpgrade python-perfUpgrade python-perf-debuginfoUpgrade kernelUpgrade bpftoolUpgrade kernel-debuginfo | Aug 2, 2026 | Aug 2, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel6.18-tools-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade kernel-tools-develUpgrade python3-perf6.18Upgrade python3-perfUpgrade kernel6.18-tools-develUpgrade kernel6.12-tools-develUpgrade bpftool6.18-debuginfoUpgrade kernel6.12-debuginfoUpgrade kernel6.12-toolsUpgrade kernel6.12-develUpgrade kernel6.18Upgrade kernel6.18-debuginfoUpgrade kernel-develUpgrade microvm-kernel6.18Upgrade kernel-debuginfoUpgrade kernel6.18-debuginfo-common-x86_64Upgrade kernelUpgrade kernel-livepatch-6.1.176-220.358Upgrade python3-perf6.12Upgrade kernel6.18-modules-extraUpgrade perf6.18Upgrade kernel6.18-headersUpgrade kernel-livepatch-6.12.94-123.174Upgrade kernel6.18-toolsUpgrade bpftoolUpgrade python3-perf6.18-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade python3-perf6.12-debuginfoUpgrade kernel-modules-extra-commonUpgrade perf6.12-debuginfoUpgrade kernel6.18-develUpgrade bpftool6.12Upgrade kernel-toolsUpgrade bpftool-debuginfoUpgrade kernel6.12-debuginfo-common-x86_64Upgrade perfUpgrade kernel-modules-extraUpgrade bpftool6.12-debuginfoUpgrade kernel6.18-modules-extra-commonUpgrade perf-debuginfoUpgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.12-modules-extraUpgrade kernel6.12-headersUpgrade kernel6.12-modules-extra-commonUpgrade kernel-headersUpgrade perf6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-livepatch-6.18.35-68.127Upgrade python3-perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool6.18Upgrade perf6.18-debuginfoUpgrade kernel6.12Upgrade kernel-tools-debuginfo | Aug 10, 2026 | Jul 19, 2026 |
| Debian | — | Upgrade linux | Jul 20, 2026 | Jul 20, 2026 |
| Oracle_linux | — | Upgrade kernel | Oct 22, 2026 | Jul 19, 2026 |
| Redhat_linux | — | Upgrade kernel-rtNo solution existsUpgrade kernel | Jul 23, 2026 | Jul 19, 2026 |
| Rocky_linux | — | Upgrade kernel-coreUpgrade kernel-rt-modules-extraUpgrade kernel-develUpgrade kernel-rt-debug-debuginfoUpgrade kernel-modules-extraUpgrade kernel-rt-debugUpgrade kernel-rt-kvmUpgrade kernel-rt-debug-modules-extraUpgrade kernel-debug-develUpgrade kernel-debug-coreUpgrade kernel-modulesUpgrade bpftoolUpgrade python3-perfUpgrade perfUpgrade kernel-rt-debug-modulesUpgrade kernel-debugUpgrade kernel-tools-libsUpgrade kernel-rt-debuginfo-common-x86_64Upgrade kernel-rt-debug-coreUpgrade python3-perf-debuginfoUpgrade kernel-rt-develUpgrade kernel-debuginfoUpgrade kernel-rt-coreUpgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-toolsUpgrade kernel-rt-debuginfoUpgrade kernel-rt-debug-develUpgrade kernel-rt-debug-kvmUpgrade kernelUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-rtUpgrade kernel-tools-libs-develUpgrade kernel-debug-modules-extraUpgrade kernel-rt-modulesUpgrade kernel-debug-modulesUpgrade kernel-debug-debuginfo | Oct 7, 2026 | Oct 6, 2026 |
| Ubuntu | — | Upgrade linux-image-5.15.0-1111-intel-iotgUpgrade linux-image-5.15.0-1111-nvidia-lowlatencyUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-realtimeUpgrade linux-image-5.15.0-1112-gkeUpgrade linux-image-5.15.0-1116-gcp-fipsUpgrade linux-image-5.15.0-194-fipsUpgrade linux-image-gcp-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-azure-fipsUpgrade linux-image-gcp-7.0Upgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-aws-lts-24.04Upgrade linux-image-azure-fde-5.15Upgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-oem-20.04dUpgrade linux-image-raspi-7.0Upgrade linux-image-azure-fips-6.8Upgrade linux-image-5.15.0-194-genericUpgrade linux-image-6.8.0-1062-oracleUpgrade linux-image-azure-cvmUpgrade linux-image-6.8.0-142-lowlatency-64kUpgrade linux-image-gkeop-5.15Upgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.8.0-2054-raspi-realtimeUpgrade linux-image-nvidia-tegra-igxUpgrade linux-image-6.8.0-1065-ibmUpgrade linux-image-aws-fips-6.8Upgrade linux-image-5.15.0-1057-nvidia-tegra-igxUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-oracleUpgrade linux-image-generic-6.8Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-generic-5.15Upgrade linux-image-6.8.0-1035-nvidia-tegraUpgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-5.15.0-1122-azureUpgrade linux-image-awsUpgrade linux-image-5.15.0-1110-ibmUpgrade linux-image-fips-5.15Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-virtual-5.15Upgrade linux-image-azure-7.0Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-6.8.0-142-fipsUpgrade linux-image-5.15.0-1108-kvmUpgrade linux-image-6.8.0-1069-gcpUpgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-5.15.0-1099-gkeopUpgrade linux-image-6.8.1-1060-realtimeUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-nvidia-6.8Upgrade linux-image-laptop-23.10Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-raspi-nolpaeUpgrade linux-image-gkeUpgrade linux-image-5.15.0-1108-intel-iot-realtimeUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-generic-hwe-20.04Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-virtualUpgrade linux-image-6.8.0-1063-nvidia-lowlatencyUpgrade linux-image-aws-5.15Upgrade linux-image-fips-6.8Upgrade linux-image-5.15.0-1118-gcpUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-kvmUpgrade linux-image-7.0.0-1014-azureUpgrade linux-image-5.15.0-1111-nvidiaUpgrade linux-image-6.8.0-1065-aws-64kUpgrade linux-image-6.8.0-1068-azureUpgrade linux-image-6.8.0-1069-gcp-64kUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-6.8.0-1063-nvidiaUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-lowlatency-5.15Upgrade linux-image-generic-64k-6.8Upgrade linux-image-lowlatency-6.8Upgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-oracle-6.8Upgrade linux-image-6.8.0-1065-aws-fipsUpgrade linux-image-gcp-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-aws-64k-6.8Upgrade linux-image-5.15.0-1116-awsUpgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-aws-64k-5.15Upgrade linux-image-6.8.0-1065-raspiUpgrade linux-image-azure-fde-6.8Upgrade linux-image-5.15.0-1117-gcpUpgrade linux-image-6.8.0-1050-gkeopUpgrade linux-image-oem-20.04Upgrade linux-image-6.8.0-1068-azure-fipsUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-5.15.0-1122-azure-fipsUpgrade linux-image-5.15.0-194-generic-lpaeUpgrade linux-image-5.15.0-1079-xilinx-zynqmpUpgrade linux-image-nvidia-5.15Upgrade linux-image-azure-fips-5.15Upgrade linux-image-6.8.0-1062-oracle-64kUpgrade linux-image-5.15.0-1116-aws-fipsUpgrade linux-image-realtime-6.8.1Upgrade linux-image-raspi-realtimeUpgrade linux-image-oracle-64kUpgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-azure-fde-7.0Upgrade linux-image-azureUpgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-6.8.0-142-lowlatencyUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-aws-fips-5.15Upgrade linux-image-6.8.0-1068-gcp-fipsUpgrade linux-image-6.8.0-1063-nvidia-lowlatency-64kUpgrade linux-image-5.15.0-1068-nvidia-tegra-rtUpgrade linux-image-raspi-6.8Upgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-gke-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-aws-lts-22.04Upgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-6.8.0-1066-azure-fdeUpgrade linux-image-6.8.0-1063-nvidia-64kUpgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-5.15.0-1113-oracleUpgrade linux-image-realtime-5.15Upgrade linux-image-oracle-lts-24.04Upgrade linux-image-oem-20.04cUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-nvidia-tegraUpgrade linux-image-nvidia-7.0Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-lowlatency-64kUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-generic-64kUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-gcpUpgrade linux-image-aws-fipsUpgrade linux-image-5.15.0-1121-azure-fdeUpgrade linux-image-6.8.0-1065-awsUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-kvm-5.15Upgrade linux-image-intelUpgrade linux-image-ibm-5.15Upgrade linux-image-fipsUpgrade linux-image-5.15.0-1110-raspiUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-nvidia-64kUpgrade linux-image-gke-64k-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-oracle-7.0Upgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-7.0.0-1010-azureUpgrade linux-image-ibm-6.8Upgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-5.15.0-1114-oracleUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-virtual-6.8Upgrade linux-image-raspi-realtime-6.8Upgrade linux-image-raspiUpgrade linux-image-oracle-5.15Upgrade linux-image-nvidia-bosUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-ibm-7.0Upgrade linux-image-gkeopUpgrade linux-image-azure-lts-22.04Upgrade linux-image-nvidia-bos-7.0Upgrade linux-image-nvidiaUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-aws-7.0Upgrade linux-image-6.8.0-142-genericUpgrade linux-image-5.15.0-194-generic-64kUpgrade linux-image-oem-20.04bUpgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-gke-5.15Upgrade linux-image-generic-64k-5.15Upgrade linux-image-intel-iotgUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-genericUpgrade linux-image-azure-lts-24.04Upgrade linux-image-6.8.0-1064-gke-64kUpgrade linux-image-5.15.0-194-lowlatencyUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-aws-64kUpgrade linux-image-6.8.0-1064-gkeUpgrade linux-image-5.15.0-1115-realtimeUpgrade linux-image-raspi-5.15Upgrade linux-image-azure-fdeUpgrade linux-image-lowlatencyUpgrade linux-image-gke-6.8Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1066-ibmUpgrade linux-image-ibm-classicUpgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-generic-lpaeUpgrade linux-image-5.15.0-1057-nvidia-tegra-igx-rtUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-ibmUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-azure-6.8Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-6.8.0-142-generic-64kUpgrade linux-image-6.8.0-1035-nvidia-tegra-rtUpgrade linux-image-5.15.0-194-lowlatency-64kUpgrade linux-image-5.15.0-1116-aws-64kUpgrade linux-image-5.15.0-1068-nvidia-tegra | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 27, 2026 | Jul 19, 2026 |
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