In the Linux kernel, the following vulnerability has been resolved:
mptcp: ensure snd_una is properly initialized on connect
This is strictly related to commit fb7a0d334894 ("mptcp: ensure snd_nxt is properly initialized on connect"). It turns out that syzkaller can trigger the retransmit after fallback and before processing any other incoming packet - so that snd_una is still left uninitialized.
Address the issue explicitly initializing snd_una together with snd_nxt and write_seq.
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 |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-rtUpgrade kernel-64k-debug-modules-coreUpgrade kernel-64k-modulesUpgrade kernel-tools-libsUpgrade kernel-debug-modules-coreUpgrade kernel-64k-modules-extraUpgrade kernel-rt-develUpgrade kernel-64k-debug-devel-matchedUpgrade kernel-64k-debug-develUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-zfcpdump-coreUpgrade kernel-develUpgrade rvUpgrade kernel-debug-modulesUpgrade kernel-rt-modules-extraUpgrade bpftoolUpgrade kernel-tools-libs-develUpgrade kernel-cross-headersUpgrade kernel-rt-debugUpgrade kernel-rt-debug-coreUpgrade kernel-64k-debug-coreUpgrade kernel-64k-debugUpgrade kernel-rt-kvmUpgrade kernel-toolsUpgrade kernel-debug-uki-virtUpgrade kernel-64k-debug-modulesUpgrade kernel-debug-modules-extraUpgrade kernelUpgrade kernel-64kUpgrade kernel-debug-develUpgrade kernel-modules-extraUpgrade python3-perfUpgrade kernel-debug-devel-matchedUpgrade kernel-64k-debug-modules-extraUpgrade kernel-devel-matchedUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-debug-modules-coreUpgrade kernel-abi-stablelistsUpgrade kernel-debug-coreUpgrade libperfUpgrade rtlaUpgrade kernel-coreUpgrade kernel-rt-debug-modules-extraUpgrade kernel-docUpgrade kernel-debugUpgrade kernel-64k-coreUpgrade kernel-zfcpdump-develUpgrade kernel-rt-modules-coreUpgrade perfUpgrade kernel-uki-virtUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-rt-debug-develUpgrade kernel-zfcpdumpUpgrade kernel-rt-modulesUpgrade kernel-rt-debug-kvmUpgrade kernel-64k-devel-matchedUpgrade kernel-modulesUpgrade kernel-headersUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-64k-develUpgrade kernel-rt-coreUpgrade kernel-modules-coreUpgrade kernel-64k-modules-coreUpgrade kernel-rt-debug-modules | Sep 26, 2024 | Jul 12, 2024 |
| Amazon Linux Ami 2 | — | Upgrade perf-debuginfoUpgrade kernel-develUpgrade perfUpgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade bpftoolUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-headersUpgrade kernel-livepatch-5.10.223-211.872Upgrade kernel-debuginfoUpgrade kernelUpgrade kernel-toolsUpgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.15.162-107.160 | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade perf-debuginfoUpgrade kernel-toolsUpgrade kernel-libbpf-staticUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-develUpgrade kernel-modules-extra-commonUpgrade kernel-modules-extraUpgrade python3-perfUpgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64Upgrade kernelUpgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade perfUpgrade bpftoolUpgrade kernel-libbpfUpgrade kernel-develUpgrade bpftool-debuginfoUpgrade kernel-livepatch-6.1.96-102.177Upgrade kernel-debuginfoUpgrade python3-perf-debuginfo | Oct 16, 2025 | Jul 12, 2024 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Jul 17, 2024 | Jul 12, 2024 |
| Oracle_linux | — | Upgrade kernelUpgrade kernel-uek | Oct 16, 2024 | Jul 12, 2024 |
| Redhat_linux | — | No solution existsUpgrade kernel-rtUpgrade kernel | Sep 25, 2024 | Jul 12, 2024 |
| Rocky_linux | — | Upgrade kernel-rt-debuginfoUpgrade kernel-rtUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-debug-debuginfoUpgrade rvUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-rt-kvmUpgrade kernel-tools-libs-develUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-debug-coreUpgrade kernel-rt-debug-modules-coreUpgrade kernel-zfcpdump-modulesUpgrade bpftoolUpgrade kernel-zfcpdump-modules-coreUpgrade libperf-debuginfoUpgrade libperfUpgrade kernel-devel-matchedUpgrade kernel-rt-modulesUpgrade kernel-toolsUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-modules-extraUpgrade bpftool-debuginfoUpgrade kernel-debug-modules-extraUpgrade kernel-rt-modules-coreUpgrade kernel-debug-modulesUpgrade kernel-debug-modules-coreUpgrade kernel-zfcpdump-develUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-headersUpgrade kernel-modulesUpgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade python3-perfUpgrade kernel-rt-debug-debuginfoUpgrade python3-perf-debuginfoUpgrade kernel-cross-headersUpgrade kernel-modules-extraUpgrade rtlaUpgrade kernel-rt-debug-modulesUpgrade kernel-modules-coreUpgrade kernel-develUpgrade kernel-debug-develUpgrade kernel-debug-coreUpgrade kernel-coreUpgrade kernel-debuginfoUpgrade kernel-tools-libsUpgrade kernel-rt-debug-kvmUpgrade kernel-uki-virtUpgrade perfUpgrade kernel-rt-develUpgrade kernel-rt-debug-develUpgrade kernelUpgrade kernel-rt-debug-modules-extraUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-zfcpdumpUpgrade kernel-rt-debuginfo-common-x86_64Upgrade kernel-debug-uki-virtUpgrade kernel-rt-debugUpgrade kernel-rt-coreUpgrade kernel-debug | Oct 2, 2024 | Jul 12, 2024 |
| Suse | — | Upgrade reiserfs-kmp-defaultUpgrade cluster-md-kmp-defaultUpgrade kernel-rt-livepatch-develUpgrade kernel-64kb-extraUpgrade kernel-64kb-develUpgrade kernel-rt_debug-livepatch-develUpgrade kselftests-kmp-defaultUpgrade kernel-rt_debugUpgrade dtb-apmUpgrade dtb-armUpgrade dtb-nvidiaUpgrade kernel-macrosUpgrade dtb-rockchipUpgrade dlm-kmp-defaultUpgrade kernel-rt_debug-vdsoUpgrade kernel-obs-qaUpgrade kernel-default-livepatch-develUpgrade dtb-sprdUpgrade kernel-rt-develUpgrade kernel-defaultUpgrade kernel-debug-livepatch-develUpgrade kernel-docsUpgrade kernel-debug-develUpgrade kernel-rt-extraUpgrade dtb-socionextUpgrade reiserfs-kmp-rtUpgrade dtb-amdUpgrade dtb-renesasUpgrade kernel-azure-vdsoUpgrade kernel-symsUpgrade reiserfs-kmp-azureUpgrade cluster-md-kmp-64kbUpgrade kernel-default-base-rebuildUpgrade kernel-obs-buildUpgrade dlm-kmp-rtUpgrade kernel-default-extraUpgrade kernel-devel-rtUpgrade dtb-mediatekUpgrade kernel-default-baseUpgrade dtb-amlogicUpgrade kernel-syms-rtUpgrade dlm-kmp-azureUpgrade kselftests-kmp-rtUpgrade kernel-docs-htmlUpgrade kernel-debugUpgrade kernel-azure-extraUpgrade kernel-64kb-optionalUpgrade dtb-allwinnerUpgrade ocfs2-kmp-64kbUpgrade kernel-64kbUpgrade kernel-default-optionalUpgrade kernel-azure-develUpgrade dtb-lgUpgrade dtb-qcomUpgrade gfs2-kmp-defaultUpgrade kernel-source-rtUpgrade kernel-default-develUpgrade gfs2-kmp-64kbUpgrade dtb-amazonUpgrade dtb-marvellUpgrade dtb-hisiliconUpgrade kernel-64kb-livepatch-develUpgrade gfs2-kmp-azureUpgrade dtb-caviumUpgrade kernel-develUpgrade kernel-rt_debug-develUpgrade gfs2-kmp-rtUpgrade kernel-kvmsmall-develUpgrade cluster-md-kmp-azureUpgrade ocfs2-kmp-rtUpgrade kernel-kvmsmall-vdsoUpgrade kernel-devel-azureUpgrade dtb-appleUpgrade kernel-rtUpgrade kernel-source-azureUpgrade kernel-debug-vdsoUpgrade kernel-syms-azureUpgrade kernel-source-vanillaUpgrade dtb-freescaleUpgrade reiserfs-kmp-64kbUpgrade kernel-zfcpdumpUpgrade dtb-exynosUpgrade kernel-azure-optionalUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-default-vdsoUpgrade dtb-alteraUpgrade ocfs2-kmp-defaultUpgrade ocfs2-kmp-azureUpgrade dtb-broadcomUpgrade dtb-xilinxUpgrade kernel-rt-livepatchUpgrade kernel-azureUpgrade dlm-kmp-64kbUpgrade kernel-kvmsmallUpgrade kernel-default-livepatchUpgrade cluster-md-kmp-rtUpgrade kernel-rt-optionalUpgrade kernel-azure-livepatch-develUpgrade kselftests-kmp-azureUpgrade kselftests-kmp-64kbUpgrade kernel-sourceUpgrade kernel-rt-vdso | Aug 8, 2024 | Jul 12, 2024 |
| Ubuntu | — | Upgrade linux-image-5.15.0-1072-azure-fdeUpgrade linux-image-6.8.0-1012-oracleUpgrade linux-image-5.15.0-1069-awsUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-5.15.0-121-lowlatency-64kUpgrade linux-image-genericUpgrade linux-image-5.15.0-1035-xilinx-zynqmpUpgrade linux-image-raspiUpgrade linux-image-nvidia-6.8Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-5.15.0-1064-nvidia-lowlatencyUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1013-nvidiaUpgrade linux-image-5.15.0-1072-azureUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1014-azure-fdeUpgrade linux-image-6.8.0-1015-awsUpgrade linux-image-6.8.0-44-lowlatency-64kUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-azureUpgrade linux-image-5.15.0-1064-intel-iotgUpgrade linux-image-5.15.0-1066-kvmUpgrade linux-image-5.15.0-1062-raspiUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-oem-22.04cUpgrade linux-image-intelUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-6.8.0-1013-nvidia-lowlatencyUpgrade linux-image-6.8.0-1011-raspiUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-6.8.0-1014-gcpUpgrade linux-image-6.8.0-1012-ibmUpgrade linux-image-intel-iotgUpgrade linux-image-oem-22.04dUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-raspi-nolpaeUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-azure-cvmUpgrade linux-image-oem-20.04Upgrade linux-image-gkeopUpgrade linux-image-gkeUpgrade linux-image-5.15.0-121-generic-64kUpgrade linux-image-gkeop-5.15Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-44-genericUpgrade linux-image-5.15.0-121-genericUpgrade linux-image-generic-64kUpgrade linux-image-oem-20.04dUpgrade linux-image-6.8.0-1013-nvidia-lowlatency-64kUpgrade linux-image-5.15.0-1068-gcpUpgrade linux-image-ibm-classicUpgrade linux-image-oem-20.04bUpgrade linux-image-6.8.0-45-genericUpgrade linux-image-nvidiaUpgrade linux-image-5.15.0-1066-gkeUpgrade linux-image-oracleUpgrade linux-image-5.15.0-1062-ibmUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1010-gkeUpgrade linux-image-nvidia-64kUpgrade linux-image-awsUpgrade linux-image-oem-20.04cUpgrade linux-image-gke-5.15Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-gcpUpgrade linux-image-aws-lts-22.04Upgrade linux-image-6.8.0-1014-azureUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.8.0-44-generic-64kUpgrade linux-image-oracle-64kUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-6.8.0-1012-oracle-64kUpgrade linux-image-5.15.0-1064-nvidiaUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-oem-22.04bUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-5.15.0-121-generic-lpaeUpgrade linux-image-5.15.0-1067-oracleUpgrade linux-image-5.15.0-1052-gkeopUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-ibmUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-45-generic-64kUpgrade linux-image-lowlatencyUpgrade linux-image-kvmUpgrade linux-image-azure-fdeUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-5.15.0-121-lowlatencyUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-virtualUpgrade linux-image-oem-22.04aUpgrade linux-image-6.8.0-44-lowlatencyUpgrade linux-image-6.8.0-1013-nvidia-64kUpgrade linux-image-6.8.0-1012-oem | Sep 12, 2024 | Jul 12, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2025 | Jul 12, 2024 |
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