CVE-2026-63867

CVE-2026-63867 : In the Linux kernel, a TOCTOU race in MPTCP was resolved in the rcv_wnd computation. The MPTCP output path locklessly accesses the MPTCP-level ack_seq multiple times, potentially using different data_ack values from the DSS option to compute the announced rcv_wnd for the same pac...

CVE-2026-63867

In the Linux kernel, the following vulnerability has been resolved: mptcp: close TOCTOU race while computing rcvwnd The MPTCP output path access locklessly the MPTCP-level ackseq in multiple times, using possibly different values for the dataack in the DSS option and to compute the announced rcv...

AZL-90404 CVE-2026-53183 affecting package kernel for versions less than 6.6.143.1-1

In the Linux kernel, the following vulnerability has been resolved: mptcp: allow subflow rcv wnd to shrink In MPTCP connection, the window field in the TCP header refers to the MPTCP-level rcvnxt and it's right edge should not move backward. Such constraint is enforced at DSS option generation...