CVE-2023-53438: x86/MCE: Always save CS register on AMD Zen IF Poison errors

Overview

Severity

Medium (CVSS 5.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2025-Sep

Released

2025-12-12

Last Updated

2026-03-31

EPSS Score

0.01% (percentile: 2.7%)

Affected Products (3)

Other

• 17087-17086
• 20925-17086
• 21093-17086

Revision History

• 2025-12-12: Information published.
• 2026-03-03: Information published.
• 2026-03-31: Information published.