CVE-2023-40550 - CVE House
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Status published Medium CVE-2023-40550

Shim: out-of-bound read in verify_buffer_sbat()

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

Affected Vendor

Affected Software

Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat Enterprise Linux 8.2 Telecommunications Update Service, Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Telecommunications Update Service, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Enterprise Linux 9.2 Extended Update Support
Vulnerable Versions:
0:15.8-3.el7, 0:15.8-1.el7, 0:15.8-4.el8_9, 0:15.8-2.el8_2, 0:15.8-2.el8_4, 0:15.8-2.el8_6, 0:15.8-2.el8, 0:15.8-4.el9_3, 0:15.8-3.el9, 0:15.8-2.el9, 0:15.8-3.el9_2

Timeline

Official Publish: January 29th, 2024
Last Modified: January 27th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weaknesses (CWE)