cve-2024-45010
Vulnerability from cvelistv5
Published
2024-09-11 15:13
Modified
2024-12-19 09:20
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/322ea3778965da72862cca2a0c50253aacf65fe6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/43cf912b0b0fc7b4fd12cbc735d1f5afb8e1322dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7fdc870d08960961408a44c569f20f50940e7d4fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9849cfc67383ceb167155186f8f8fe8a896b60b3Patch
Impacted products
Vendor Product Version
Linux Linux Version: 06faa22710342bca5e9c249634199c650799fce6
Version: 06faa22710342bca5e9c249634199c650799fce6
Version: 06faa22710342bca5e9c249634199c650799fce6
Version: 06faa22710342bca5e9c249634199c650799fce6
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   Linux Linux Version: 5.13
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