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

mptcp: close TOCTOU race while computing rcv_wnd

The MPTCP output path access locklessly the MPTCP-level ack_seq
in multiple times, using possibly different values for the data_ack
in the DSS option and to compute the announced rcv wnd for the same
packet.

Refactor the cote to avoid inconsistencies which may confuse the
peer. Also ensure that the MPTCP level rcv wnd is updated only when
the egress packet actually contains a DSS ack.

https://git.kernel.org/stable/c/301a33fd590c408a05c5df800e0cc1e6a8a2f8f8

https://git.kernel.org/stable/c/3b8cbba7c0ed31189c89f90be247b8973ffa79ef

https://git.kernel.org/stable/c/68364963e5baf03f16b4420292291f75c8f66497

https://git.kernel.org/stable/c/8ab24fdebc369c0dfb90f82c1650b1e66662bb45

https://git.kernel.org/stable/c/8f4f0a157e8436a05bf8c3670b24dbc258911c43

https://git.kernel.org/stable/c/907ac6b1658e0277f979fcdfae2a753b495c1510

https://git.kernel.org/stable/c/c4f4cf60797974873dbc8e100144682a6f2f861f

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