CVE-2024-53122 Information

Description

In the Linux kernel the following vulnerability has been resolved:

mptcp: cope racing subflow creation in mptcp_rcv_space_adjust

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 received on an already established subflow would unconditionally call tcp_cleanup_rbuf() on all the current subflows potentially hitting a divide by zero error on the newly created ones.

Explicitly check that the subflow is in a suitable state before invoking tcp_cleanup_rbuf().

Reference

https://git.kernel.org/stable/c/24995851d58c4a205ad0ffa7b2f21e479a9c8527 https://git.kernel.org/stable/c/aad6412c63baa39dd813e81f16a14d976b3de2e8 https://git.kernel.org/stable/c/ce7356ae35943cc6494cc692e62d51a734062b7d https://git.kernel.org/stable/c/ff825ab2f455299c0c7287550915a8878e2a66e0