CVE-2025-71088 mptcp: fallback earlier on simult connection

In the Linux kernel, the following vulnerability has been resolved: mptcp: fallback earlier on simult connection Syzkaller reports a simult-connect race leading to inconsistent fallback status: WARNING: CPU: 3 PID: 33 at net/mptcp/subflow.c:1515 subflowdataready+0x40b/0x7c0 net/mptcp/subflow.c:15...

CVE-2025-71088 mptcp: fallback earlier on simult connection

In the Linux kernel, the following vulnerability has been resolved: mptcp: fallback earlier on simult connection Syzkaller reports a simult-connect race leading to inconsistent fallback status: WARNING: CPU: 3 PID: 33 at net/mptcp/subflow.c:1515 subflowdataready+0x40b/0x7c0 net/mptcp/subflow.c:15...

CVE-2025-71088

CVE-2025-71088 affects the Linux kernel’s mptcp implementation. Syzkaller reported a simult-connect race in net/mptcp/subflow.c where a TCP subflow can process a simult-ack after transitioning to TCP_FIN1, bypassing the MPTCP fallback check and leaving the socket in an inconsistent state; this ca...