Use of Uninitialized Variable Affecting kernel-rt-debug-devel package, versions <0:5.14.0-427.26.1.el9_4


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-RHEL9-KERNELRTDEBUGDEVEL-8477906
  • published5 Dec 2024
  • disclosed19 Jun 2024

Introduced: 19 Jun 2024

CVE-2024-38593  (opens in a new tab)
CWE-457  (opens in a new tab)

How to fix?

Upgrade RHEL:9 kernel-rt-debug-devel to version 0:5.14.0-427.26.1.el9_4 or higher.
This issue was patched in RHSA-2024:4583.

NVD Description

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

In the Linux kernel, the following vulnerability has been resolved:

net: micrel: Fix receiving the timestamp in the frame for lan8841

The blamed commit started to use the ptp workqueue to get the second part of the timestamp. And when the port was set down, then this workqueue is stopped. But if the config option NETWORK_PHY_TIMESTAMPING is not enabled, then the ptp_clock is not initialized so then it would crash when it would try to access the delayed work. So then basically by setting up and then down the port, it would crash. The fix consists in checking if the ptp_clock is initialized and only then cancel the delayed work.

CVSS Scores

version 3.1