What’s Vulnerable › Vulnerabilities

CVE-2022-42331

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-21 · updated 2026-06-17

Description

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: 37, 38
• xen: from 4.5.0 through 4.17.0

References

• http://www.openwall.com/lists/oss-security/2023/03/21/3
• http://xenbits.xen.org/xsa/advisory-429.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L6PM4RE7MUE6OWA32ZVOXCP235RM2TM/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APBMS2Q6746AXAFAITNJMGBNFGNMVLWR/
• https://security.gentoo.org/glsa/202402-07
• https://www.debian.org/security/2023/dsa-5378
• https://xenbits.xenproject.org/xsa/advisory-429.txt
• http://www.openwall.com/lists/oss-security/2023/03/21/3
• http://xenbits.xen.org/xsa/advisory-429.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L6PM4RE7MUE6OWA32ZVOXCP235RM2TM/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APBMS2Q6746AXAFAITNJMGBNFGNMVLWR/
• https://security.gentoo.org/glsa/202402-07

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