CVE-2022-42327 - CVE House
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Status published Unknown CVE-2022-42327

x86: unintended memory sharing between guests On Intel systems that...

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • {'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Andrew Cooper of Citrix.'}]}}}

References

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Affected Vendor

Affected Software

xen
Vulnerable Versions:
consult Xen advisory XSA-412

Timeline

Official Publish: November 1st, 2022
Last Modified: May 5th, 2025
Added to House: July 21st, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.