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().

Classification

CVE ID: CVE-2024-53122

CVSS Base Severity: LOW

CVSS Base Score: 0.0

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 5.06% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

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

Timeline