Race Condition Affecting kernel-64k package, versions <0:5.14.0-503.21.1.el9_5


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-ALMALINUX9-KERNEL64K-8622514
  • published14 Jan 2025
  • disclosed8 Jan 2025

Introduced: 8 Jan 2025

NewCVE-2024-53122  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 kernel-64k to version 0:5.14.0-503.21.1.el9_5 or higher.
This issue was patched in ALSA-2025:0059.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k package and not the kernel-64k package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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().

CVSS Scores

version 3.1