CVE-2024-53122 mptcp: cope racing subflow creation in mptcp_rcv_space_adjust

In the Linux kernel, the following vulnerability has been resolved: mptcp: cope racing subflow creation in mptcprcvspaceadjust Additional active subflows - i.e. created by the in kernel path manager - are included into the subflow list before starting the 3whs. A racing recvmsg spooling data...

CVE-2024-53122

CVE-2024-53122 affects the Linux kernel mptcp subsystem. A race during subflow creation in mptcp_rcv_space_adjust could cause a racing recvmsg() to trigger tcp_cleanup_rbuf() on all current subflows, potentially leading to a divide-by-zero in newly created subflows. The fix explicitly checks subf...