In the Linux kernel, the following vulnerability has been resolved:
mptcp: close TOCTOU race while computing rcv_wnd
The MPTCP output path access locklessly the MPTCP-level ack_seq in multiple times, using possibly different values for the data_ack in the DSS option and to compute the announced rcv wnd for the same packet.
Refactor the cote to avoid inconsistencies which may confuse the peer. Also ensure that the MPTCP level rcv wnd is updated only when the egress packet actually contains a DSS ack.
CVSS Details
- CVSS 3.1 Base Score: 8.2
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-5.15.210-148.245Upgrade kernel-headersUpgrade perf-debuginfoUpgrade perfUpgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade kernel-develUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernel-toolsUpgrade python-perfUpgrade kernelUpgrade kernel-debuginfo-common-aarch64 | Aug 2, 2026 | Aug 2, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-debuginfoUpgrade bpftoolUpgrade perf6.12Upgrade python3-perf6.18-debuginfoUpgrade python3-perf-debuginfoUpgrade bpftool6.18Upgrade kernel6.12-develUpgrade kernelUpgrade kernel6.12-debuginfoUpgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-modules-extra-commonUpgrade kernel-livepatch-6.18.36-69.134Upgrade python3-perf6.18Upgrade kernel-modules-extraUpgrade kernel-toolsUpgrade perf6.18Upgrade bpftool-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel6.12Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel-debuginfo-common-x86_64Upgrade kernel6.12-headersUpgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade kernel6.18-headersUpgrade kernel6.18-debuginfoUpgrade kernel6.12-toolsUpgrade kernel-livepatch-6.12.94-123.174Upgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade python3-perfUpgrade kernel6.18-tools-develUpgrade kernel6.18-modules-extraUpgrade python3-perf6.12-debuginfoUpgrade perfUpgrade kernel6.18-develUpgrade kernel-livepatch-6.1.176-220.358Upgrade kernel6.18-toolsUpgrade kernel6.12-debuginfo-common-aarch64Upgrade bpftool6.12Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-modules-extraUpgrade python3-perf6.12Upgrade perf-debuginfoUpgrade kernel6.18Upgrade bpftool6.18-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.12-tools-develUpgrade kernel-modules-extra-commonUpgrade perf6.12-debuginfoUpgrade kernel-headersUpgrade bpftool6.12-debuginfoUpgrade perf6.18-debuginfoUpgrade microvm-kernel6.18 | Aug 10, 2026 | Jul 19, 2026 |
| Debian | — | Upgrade linux | Jul 20, 2026 | Jul 20, 2026 |
| Redhat_linux | — | No solution exists | Aug 10, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-7.0.0-1018-nvidiaUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oem-26.04aUpgrade linux-image-5.15.0-198-generic-64kUpgrade linux-image-azure-lts-26.04Upgrade linux-image-5.15.0-195-lowlatencyUpgrade linux-image-aws-fipsUpgrade linux-image-gke-64kUpgrade linux-image-oracle-7.0Upgrade linux-image-5.15.0-1113-gkeUpgrade linux-image-fipsUpgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-5.15Upgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-31-realtimeUpgrade linux-image-gcp-7.0Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-5.15.0-1123-azure-fipsUpgrade linux-image-5.15.0-1111-ibmUpgrade linux-image-5.15.0-1117-awsUpgrade linux-image-5.15.0-1109-kvmUpgrade linux-image-aws-fips-5.15Upgrade linux-image-7.0.0-31-realtime-64kUpgrade linux-image-nvidiaUpgrade linux-image-ibmUpgrade linux-image-azure-lts-22.04Upgrade linux-image-generic-5.15Upgrade linux-image-7.0.0-1012-awsUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-aws-64k-5.15Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-azure-fdeUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-5.15.0-1116-realtimeUpgrade linux-image-lowlatency-64kUpgrade linux-image-raspi-7.0Upgrade linux-image-gke-7.0Upgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-oem-26.04bUpgrade linux-image-oracleUpgrade linux-image-nvidia-7.0Upgrade linux-image-genericUpgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-generic-lpaeUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-5.15.0-1117-aws-fipsUpgrade linux-image-generic-64k-5.15Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-7.0.0-1019-raspiUpgrade linux-image-7.0.0-1006-gkeUpgrade linux-image-gkeopUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-oracle-5.15Upgrade linux-image-realtime-7.0Upgrade linux-image-gke-64k-7.0Upgrade linux-image-ibm-5.15Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-gcp-5.15Upgrade linux-image-gke-5.15Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-azure-fde-5.15Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-oem-20.04bUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-virtual-7.0Upgrade linux-image-5.15.0-1117-aws-64kUpgrade linux-image-awsUpgrade linux-image-azure-fips-5.15Upgrade linux-image-realtime-64k-7.0Upgrade linux-image-5.15.0-198-generic-lpaeUpgrade linux-image-gcp-fipsUpgrade linux-image-5.15.0-1109-intel-iot-realtimeUpgrade linux-image-ibm-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-7.0.0-1014-azureUpgrade linux-image-7.0.0-1018-nvidia-64kUpgrade linux-image-aws-7.0Upgrade linux-image-5.15.0-1080-xilinx-zynqmpUpgrade linux-image-5.15.0-1100-gkeopUpgrade linux-image-7.0.0-1013-oemUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-realtime-64kUpgrade linux-image-aws-64kUpgrade linux-image-7.0.0-31-generic-64kUpgrade linux-image-6.8.0-1036-nvidia-tegraUpgrade linux-image-intelUpgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-195-lowlatency-64kUpgrade linux-image-oem-7.0Upgrade linux-image-nvidia-bos-64kUpgrade linux-image-generic-hwe-26.04Upgrade linux-image-generic-64kUpgrade linux-image-nvidia-tegraUpgrade linux-image-oem-20.04dUpgrade linux-image-oem-20.04cUpgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-azure-fipsUpgrade linux-image-aws-lts-22.04Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-6.8.0-1036-nvidia-tegra-rtUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-fips-5.15Upgrade linux-image-5.15.0-1114-oracleUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-5.15.0-1122-azure-fdeUpgrade linux-image-oracle-64kUpgrade linux-image-7.0.0-1012-aws-64kUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-realtime-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-oem-20.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-virtual-5.15Upgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-azure-7.0Upgrade linux-image-7.0.0-31-genericUpgrade linux-image-5.15.0-1118-gcp-fipsUpgrade linux-image-raspiUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-generic-7.0Upgrade linux-image-7.0.0-2018-nvidia-bos-64kUpgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-5.15.0-198-genericUpgrade linux-image-virtualUpgrade linux-image-realtime-hwe-26.04Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-5.15.0-1123-azureUpgrade linux-image-5.15.0-1118-gcpUpgrade linux-image-raspi-realtimeUpgrade linux-image-7.0.0-1006-gke-64kUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-gkeUpgrade linux-image-generic-64k-7.0Upgrade linux-image-intel-iotgUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-gcpUpgrade linux-image-7.0.0-2018-nvidia-bosUpgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-aws-5.15Upgrade linux-image-virtual-hwe-26.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcp-64kUpgrade linux-image-kvm-5.15Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-azure-cvmUpgrade linux-image-oem-26.04Upgrade linux-image-nvidia-64kUpgrade linux-image-realtimeUpgrade linux-image-7.0.0-1019-raspi-realtimeUpgrade linux-image-5.15.0-1112-intel-iotgUpgrade linux-image-7.0.0-1013-ibmUpgrade linux-image-kvmUpgrade linux-image-5.15.0-198-fipsUpgrade linux-image-azure | Sep 14, 2026 | Sep 7, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 27, 2026 | Jul 19, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub