mptcp: close TOCTOU race while computing rcv_wnd

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-63867 · Microsoft / collected KEV context

cve-program · CVE-2026-63867

• https://git.kernel.org/stable/c/301a33fd590c408a05c5df800e0cc1e6a8a2f8f8
• https://git.kernel.org/stable/c/68364963e5baf03f16b4420292291f75c8f66497
• https://git.kernel.org/stable/c/907ac6b1658e0277f979fcdfae2a753b495c1510
• https://git.kernel.org/stable/c/c4f4cf60797974873dbc8e100144682a6f2f861f
• https://git.kernel.org/stable/c/3b8cbba7c0ed31189c89f90be247b8973ffa79ef
• https://git.kernel.org/stable/c/8f4f0a157e8436a05bf8c3670b24dbc258911c43
• https://git.kernel.org/stable/c/8ab24fdebc369c0dfb90f82c1650b1e66662bb45

No related operational record is retained in the current change model.