In the Linux kernel, the following vulnerability has been resolved:
mptcp: pm: only decrement add_addr_accepted for MPJ req
Adding the following warning ...
WARN_ON_ONCE(msk->pm.add_addr_accepted == 0)
... before decrementing the add_addr_accepted counter helped to find a bug when running the "remove single subflow" subtest from the mptcp_join.sh selftest.
Removing a 'subflow' endpoint will first trigger a RM_ADDR, then the subflow closure. Before this patch, and upon the reception of the RM_ADDR, the other peer will then try to decrement this add_addr_accepted. That's not correct because the attached subflows have not been created upon the reception of an ADD_ADDR.
A way to solve that is to decrement the counter only if the attached subflow was an MP_JOIN to a remote id that was not 0, and initiated by the host receiving the RM_ADDR.
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 kernel-debuginfo-common-x86_64Upgrade kernel-headersUpgrade perf-debuginfoUpgrade kernel-livepatch-5.15.167-112.165Upgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade kernelUpgrade kernel-debuginfoUpgrade perfUpgrade kernel-develUpgrade bpftool-debuginfoUpgrade bpftoolUpgrade python-perfUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-devel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade bpftoolUpgrade kernel-toolsUpgrade bpftool-debuginfoUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-modules-extraUpgrade python3-perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-libbpfUpgrade kernel-libbpf-staticUpgrade kernel-headersUpgrade kernel-livepatch-6.1.109-118.189Upgrade kernel-modules-extra-commonUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade python3-perfUpgrade kernel-tools-develUpgrade perf-debuginfoUpgrade perf | Oct 16, 2025 | Sep 11, 2024 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Oct 7, 2024 | Sep 11, 2024 |
| Redhat_linux | — | No solution existsUpgrade kernelUpgrade kernel-rt | May 15, 2025 | Sep 11, 2024 |
| Suse | — | Upgrade kselftests-kmp-64kbUpgrade kernel-64kb-extraUpgrade gfs2-kmp-azureUpgrade dtb-caviumUpgrade cluster-md-kmp-64kbUpgrade ocfs2-kmp-defaultUpgrade dtb-exynosUpgrade kernel-kvmsmallUpgrade cluster-md-kmp-rtUpgrade kernel-develUpgrade kselftests-kmp-defaultUpgrade kernel-devel-rtUpgrade kernel-sourceUpgrade dtb-rockchipUpgrade kernel-obs-buildUpgrade kernel-rt-develUpgrade kernel-rt-extraUpgrade dtb-nvidiaUpgrade dtb-mediatekUpgrade kernel-defaultUpgrade kernel-azure-develUpgrade kernel-devel-azureUpgrade kernel-obs-qaUpgrade gfs2-kmp-defaultUpgrade kernel-debug-vdsoUpgrade kernel-default-extraUpgrade dtb-armUpgrade dlm-kmp-azureUpgrade dtb-apmUpgrade dtb-xilinxUpgrade kernel-syms-azureUpgrade kernel-default-base-rebuildUpgrade dtb-allwinnerUpgrade dtb-qcomUpgrade dlm-kmp-rtUpgrade kernel-default-optionalUpgrade reiserfs-kmp-azureUpgrade kernel-64kb-develUpgrade kernel-docsUpgrade kernel-default-vdsoUpgrade dtb-sprdUpgrade kernel-rtUpgrade gfs2-kmp-64kbUpgrade kselftests-kmp-azureUpgrade ocfs2-kmp-rtUpgrade kselftests-kmp-rtUpgrade kernel-64kb-optionalUpgrade dlm-kmp-64kbUpgrade dtb-marvellUpgrade kernel-azureUpgrade kernel-syms-rtUpgrade reiserfs-kmp-defaultUpgrade kernel-rt-vdsoUpgrade kernel-rt-livepatch-develUpgrade reiserfs-kmp-64kbUpgrade ocfs2-kmp-azureUpgrade kernel-debug-develUpgrade gfs2-kmp-rtUpgrade kernel-azure-vdsoUpgrade dtb-broadcomUpgrade kernel-kvmsmall-develUpgrade dtb-amazonUpgrade kernel-symsUpgrade kernel-rt-optionalUpgrade dtb-amdUpgrade dtb-amlogicUpgrade kernel-64kbUpgrade cluster-md-kmp-azureUpgrade kernel-azure-optionalUpgrade kernel-zfcpdumpUpgrade kernel-default-livepatch-develUpgrade kernel-default-livepatchUpgrade kernel-debugUpgrade kernel-rt_debugUpgrade dlm-kmp-defaultUpgrade kernel-source-vanillaUpgrade dtb-alteraUpgrade kernel-kvmsmall-vdsoUpgrade kernel-source-rtUpgrade reiserfs-kmp-rtUpgrade kernel-rt_debug-develUpgrade dtb-renesasUpgrade kernel-macrosUpgrade kernel-azure-extraUpgrade cluster-md-kmp-defaultUpgrade ocfs2-kmp-64kbUpgrade dtb-freescaleUpgrade dtb-hisiliconUpgrade dtb-lgUpgrade dtb-socionextUpgrade kernel-default-baseUpgrade kernel-docs-htmlUpgrade kernel-source-azureUpgrade kernel-default-develUpgrade dtb-appleUpgrade kernel-rt_debug-vdso | Dec 5, 2025 | Jun 3, 2025 |
| Ubuntu | — | Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-generic-64kUpgrade linux-image-gcpUpgrade linux-image-azure-lts-22.04Upgrade linux-image-5.15.0-1038-xilinx-zynqmpUpgrade linux-image-6.8.0-1020-azureUpgrade linux-image-genericUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-5.15.0-125-lowlatency-64kUpgrade linux-image-oracle-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-5.15.0-1069-kvmUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-5.15.0-125-generic-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-gkeopUpgrade linux-image-5.15.0-1075-azureUpgrade linux-image-6.8.0-1019-nvidiaUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-6.8.0-1002-gkeopUpgrade linux-image-aws-lts-22.04Upgrade linux-image-5.15.0-1067-nvidia-lowlatencyUpgrade linux-image-oem-24.04aUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-5.15.0-1067-intel-iotgUpgrade linux-image-5.15.0-125-lowlatencyUpgrade linux-image-oem-20.04dUpgrade linux-image-6.8.0-50-generic-64kUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-oem-22.04bUpgrade linux-image-gkeUpgrade linux-image-5.15.0-1072-awsUpgrade linux-image-oem-22.04Upgrade linux-image-intelUpgrade linux-image-lowlatency-64kUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-oem-20.04Upgrade linux-image-nvidiaUpgrade linux-image-oem-20.04bUpgrade linux-image-intel-iotgUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-5.15.0-125-generic-lpaeUpgrade linux-image-5.15.0-1070-oracleUpgrade linux-image-oracleUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-5.15.0-1065-raspiUpgrade linux-image-5.15.0-125-genericUpgrade linux-image-virtualUpgrade linux-image-5.15.0-1067-nvidiaUpgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1019-nvidia-lowlatencyUpgrade linux-image-oem-20.04cUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-oem-22.04cUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1019-nvidia-64kUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-kvmUpgrade linux-image-gke-5.15Upgrade linux-image-5.15.0-1069-gkeUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1018-oemUpgrade linux-image-6.8.0-1016-raspiUpgrade linux-image-6.8.0-50-lowlatencyUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-5.15.0-1065-ibmUpgrade linux-image-5.15.0-1055-gkeopUpgrade linux-image-6.8.0-1015-gkeUpgrade linux-image-oem-22.04aUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-azure-cvmUpgrade linux-image-gkeop-5.15Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-azureUpgrade linux-image-6.8.0-50-genericUpgrade linux-image-6.8.0-1017-oracle-64kUpgrade linux-image-6.8.0-1020-azure-fdeUpgrade linux-image-6.8.0-1019-gcpUpgrade linux-image-raspi-nolpaeUpgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1019-nvidia-lowlatency-64kUpgrade linux-image-awsUpgrade linux-image-6.8.0-1020-awsUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-raspiUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-5.15.0-1071-gcpUpgrade linux-image-6.8.0-1017-ibmUpgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1017-oracleUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-50-lowlatency-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-ibmUpgrade linux-image-5.15.0-1078-azureUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-generic-lpae | Nov 12, 2024 | Sep 11, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 13, 2025 | Sep 11, 2024 |
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