In the Linux kernel, the following vulnerability has been resolved:

mptcp: pm: fix ID 0 endp usage after multiple re-creations

'local_addr_used' and 'add_addr_accepted' are decremented for addresses
not related to the initial subflow (ID0), because the source and
destination addresses of the initial subflows are known from the
beginning: they don't count as "additional local address being used" or
"ADD_ADDR being accepted".

It is then required not to increment them when the entrypoint used by
the initial subflow is removed and re-added during a connection. Without
this modification, this entrypoint cannot be removed and re-added more
than once.

kernel.org https://git.kernel.org/stable/c/119806ae4e46cf239db8e6ad92bc2fd3daae86dc [No types assigned]

kernel.org https://git.kernel.org/stable/c/53e2173172d26c0617b29dd83618b71664bed1fb [No types assigned]

kernel.org https://git.kernel.org/stable/c/9366922adc6a71378ca01f898c41be295309f044 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c9c744666f7308a4daba520191e29d395260bcfe [No types assigned]