CVE-2022-42331: Fedoraproject Fedora

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work (XSA-254), one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variety of speculative attacks.

Affected products

• Fedoraproject Fedora: version 37 only; version 38 only
• Xen Xen: from 4.5.0, up to and including 4.17.0

Published 2023-03-21. Last modified 2026-06-17.