CVE-2023-40550

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

Published Jan 29, 2024 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3813-1 shim security update
EUVD EUVD EUVD-2023-45121 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Jan 27, 2026, 10:55 AM
Reserved
Aug 15, 2023, 8:04 PM
Status
Modified
Published
Jan 29, 2024, 5:15 PM
Modified
Jun 17, 2026, 6:18 AM
Severity
Moderate
Public date
Jan 23, 2024, 12:00 AM