What’s Vulnerable › Vulnerabilities

CVE-2022-42327

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-01 · updated 2026-06-17
• Weakness: CWE-284

Description

x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.

Affected products

• Fedoraproject Fedora: 36, 37
• xen: 4.16

References

• http://www.openwall.com/lists/oss-security/2022/11/01/3
• http://xenbits.xen.org/xsa/advisory-412.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
• https://security.gentoo.org/glsa/202402-07
• https://xenbits.xenproject.org/xsa/advisory-412.txt
• http://www.openwall.com/lists/oss-security/2022/11/01/3
• http://xenbits.xen.org/xsa/advisory-412.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
• https://security.gentoo.org/glsa/202402-07
• https://xenbits.xenproject.org/xsa/advisory-412.txt

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