NULL Pointer Dereference Affecting shim-x64 package, versions <0:15.8-2.el8


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.07% (32nd percentile)

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  • Snyk IDSNYK-RHEL8-SHIMX64-6652139
  • published18 Apr 2024
  • disclosed23 Jan 2024

Introduced: 23 Jan 2024

CVE-2023-40546  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade RHEL:8 shim-x64 to version 0:15.8-2.el8 or higher.
This issue was patched in RHSA-2024:1883.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shim-x64 package and not the shim-x64 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

A flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create the new variable, it tries to print an error message to the user; however, the number of parameters used by the logging function doesn't match the format string used by it, leading to a crash under certain circumstances.

CVSS Scores

version 3.1