CVE-2023-52864 Affecting kernel-rt-devel package, versions <0:5.14.0-427.31.1.el9_4


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.04% (15th percentile)

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  • Snyk IDSNYK-ROCKY9-KERNELRTDEVEL-7775756
  • published22 Aug 2024
  • disclosed21 May 2024

Introduced: 21 May 2024

CVE-2023-52864  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 kernel-rt-devel to version 0:5.14.0-427.31.1.el9_4 or higher.
This issue was patched in RLSA-2024:5363.

NVD Description

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

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

platform/x86: wmi: Fix opening of char device

Since commit fa1f68db6ca7 ("drivers: misc: pass miscdevice pointer via file private data"), the miscdevice stores a pointer to itself inside filp->private_data, which means that private_data will not be NULL when wmi_char_open() is called. This might cause memory corruption should wmi_char_open() be unable to find its driver, something which can happen when the associated WMI device is deleted in wmi_free_devices().

Fix the problem by using the miscdevice pointer to retrieve the WMI device data associated with a char device using container_of(). This also avoids wmi_char_open() picking a wrong WMI device bound to a driver with the same name as the original driver.

CVSS Scores

version 3.1