Out-of-bounds Read Affecting shim-x64 package, versions <0:15.8-4.el8_9.alma.1


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-ALMALINUX8-SHIMX64-6836469
  • published11 May 2024
  • disclosed18 Apr 2024

Introduced: 18 Apr 2024

CVE-2023-40550  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 shim-x64 to version 0:15.8-4.el8_9.alma.1 or higher.
This issue was patched in ALSA-2024:1902.

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 AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.

CVSS Scores

version 3.1