CVE-2024-53122

Summary

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().

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/24995851d58c4a205ad0ffa7b2f21e479a9c8527 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/24995851d58c4a205ad0ffa7b2f21e479a9c8527Patch
• https://git.kernel.org/stable/c/aad6412c63baa39dd813e81f16a14d976b3de2e8Patch
• https://git.kernel.org/stable/c/ce7356ae35943cc6494cc692e62d51a734062b7dPatch
• https://git.kernel.org/stable/c/ff825ab2f455299c0c7287550915a8878e2a66e0Patch
• https://git.kernel.org/stable/c/0a9a182ea5c7bb0374e527130fd85024ace7279b
• https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html