CVE-2023-40551 MEDIUM

CVE-2023-40551: Shim: out of bounds read when parsing mz binaries

Weakness CWE-125
Published January 29, 2024
Last update November 20, 2025
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CVSS base score

5.1/10
Attack vector Local
Attack complexity Low
Privileges required High
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H

What the vulnerability does

01Description

A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system's boot phase.

Key dates

02Disclosure timeline

January 29, 2024 CVE published
November 20, 2025 Record updated