In the Linux kernel, the following vulnerability has been resolved:
mptcp: pm: only mark 'subflow' endp as available
Adding the following warning ...
WARN_ON_ONCE(msk->pm.local_addr_used == 0)
... before decrementing the local_addr_used counter helped to find a bug when running the "remove single address" subtest from the mptcp_join.sh selftests.
Removing a 'signal' endpoint will trigger the removal of all subflows linked to this endpoint via mptcp_pm_nl_rm_addr_or_subflow() with rm_type == MPTCP_MIB_RMSUBFLOW. This will decrement the local_addr_used counter, which is wrong in this case because this counter is linked to 'subflow' endpoints, and here it is a 'signal' endpoint that is being removed.
Now, the counter is decremented, only if the ID is being used outside of mptcp_pm_nl_rm_addr_or_subflow(), only for 'subflow' endpoints, and if the ID is not 0 -- local_addr_used is not taking into account these ones. This marking of the ID as being available, and the decrement is done no matter if a subflow using this ID is currently available, because the subflow could have been closed before.
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 |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Oct 7, 2024 | Sep 11, 2024 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | May 15, 2025 | Sep 11, 2024 |
| Suse | — | Upgrade dlm-kmp-64kbUpgrade dtb-allwinnerUpgrade dtb-lgUpgrade gfs2-kmp-azureUpgrade kernel-default-base-rebuildUpgrade kernel-develUpgrade kernel-source-rtUpgrade dtb-rockchipUpgrade dtb-sprdUpgrade dtb-qcomUpgrade kselftests-kmp-azureUpgrade kernel-default-develUpgrade reiserfs-kmp-64kbUpgrade kselftests-kmp-64kbUpgrade kernel-syms-azureUpgrade dtb-xilinxUpgrade kernel-rtUpgrade dtb-amazonUpgrade kernel-debugUpgrade kernel-default-livepatchUpgrade dlm-kmp-rtUpgrade kernel-azure-optionalUpgrade kernel-sourceUpgrade kernel-devel-rtUpgrade kernel-rt-extraUpgrade kernel-rt_debug-develUpgrade cluster-md-kmp-azureUpgrade ocfs2-kmp-defaultUpgrade reiserfs-kmp-azureUpgrade kernel-azureUpgrade cluster-md-kmp-64kbUpgrade gfs2-kmp-defaultUpgrade kernel-obs-buildUpgrade kernel-source-vanillaUpgrade dtb-mediatekUpgrade kernel-default-vdsoUpgrade kernel-source-azureUpgrade kernel-64kbUpgrade ocfs2-kmp-azureUpgrade cluster-md-kmp-rtUpgrade kernel-rt-optionalUpgrade dtb-caviumUpgrade dtb-freescaleUpgrade reiserfs-kmp-defaultUpgrade dtb-exynosUpgrade ocfs2-kmp-64kbUpgrade dtb-hisiliconUpgrade kernel-64kb-extraUpgrade kernel-rt-develUpgrade dtb-renesasUpgrade dtb-alteraUpgrade kernel-64kb-develUpgrade kernel-default-optionalUpgrade kernel-debug-vdsoUpgrade kernel-symsUpgrade kernel-64kb-optionalUpgrade ocfs2-kmp-rtUpgrade kselftests-kmp-defaultUpgrade gfs2-kmp-64kbUpgrade kernel-kvmsmallUpgrade kernel-default-baseUpgrade kernel-azure-extraUpgrade dtb-nvidiaUpgrade dlm-kmp-azureUpgrade kernel-azure-develUpgrade kernel-kvmsmall-develUpgrade reiserfs-kmp-rtUpgrade kernel-kvmsmall-vdsoUpgrade kernel-default-livepatch-develUpgrade kernel-obs-qaUpgrade dtb-marvellUpgrade dlm-kmp-defaultUpgrade kernel-zfcpdumpUpgrade kernel-rt_debug-vdsoUpgrade kernel-devel-azureUpgrade cluster-md-kmp-defaultUpgrade kernel-rt-vdsoUpgrade kernel-macrosUpgrade kernel-defaultUpgrade dtb-apmUpgrade kselftests-kmp-rtUpgrade kernel-rt_debugUpgrade dtb-socionextUpgrade kernel-docsUpgrade kernel-azure-vdsoUpgrade dtb-armUpgrade kernel-rt-livepatch-develUpgrade dtb-broadcomUpgrade kernel-default-extraUpgrade kernel-syms-rtUpgrade dtb-amlogicUpgrade dtb-amdUpgrade kernel-docs-htmlUpgrade dtb-appleUpgrade gfs2-kmp-rtUpgrade kernel-debug-devel | Dec 5, 2025 | Jun 3, 2025 |
| Ubuntu | — | Upgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1020-azure-fdeUpgrade linux-image-oem-22.04dUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.8.0-1017-ibmUpgrade linux-image-6.8.0-1019-gcpUpgrade linux-image-oracleUpgrade linux-image-6.8.0-1016-raspiUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-oem-22.04Upgrade linux-image-azureUpgrade linux-image-raspiUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-50-lowlatency-64kUpgrade linux-image-6.8.0-1017-oracleUpgrade linux-image-6.8.0-1018-oemUpgrade linux-image-6.8.0-1019-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-50-generic-64kUpgrade linux-image-awsUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-6.8Upgrade linux-image-azure-fdeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1019-nvidia-64kUpgrade linux-image-6.8.0-50-lowlatencyUpgrade linux-image-6.8.0-1020-awsUpgrade linux-image-6.8.0-1015-gkeUpgrade linux-image-6.8.0-1017-oracle-64kUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-virtualUpgrade linux-image-oem-24.04aUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-nvidiaUpgrade linux-image-gkeopUpgrade linux-image-kvmUpgrade linux-image-oem-22.04aUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-gkeop-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-gkeUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1002-gkeopUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-64kUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1019-nvidia-lowlatencyUpgrade linux-image-oem-24.04Upgrade linux-image-gcpUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-50-genericUpgrade linux-image-ibmUpgrade linux-image-genericUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-oem-22.04bUpgrade linux-image-6.8.0-1019-nvidiaUpgrade linux-image-6.8.0-1020-azureUpgrade linux-image-generic-hwe-24.04 | Dec 13, 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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