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CVE-2022-42327 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.1 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CNA: CISA-ADPCVSS-B:7.1 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/	CVE
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/	CVE
https://security.gentoo.org/glsa/202402-07	CVE
https://xenbits.xenproject.org/xsa/advisory-412.txt	CVE	Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/11/01/3	CVE	Mailing ListPatchThird Party Advisory
http://xenbits.xen.org/xsa/advisory-412.html	CVE	PatchVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/	[email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/	[email protected]
https://security.gentoo.org/glsa/202402-07	[email protected]
https://xenbits.xenproject.org/xsa/advisory-412.txt	[email protected]	Vendor Advisory
http://www.openwall.com/lists/oss-security/2022/11/01/3	[email protected]	Mailing ListPatchThird Party Advisory
http://xenbits.xen.org/xsa/advisory-412.html	[email protected]	PatchVendor Advisory

see all 12 references

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]
CWE-284	Improper Access Control	CISA-ADP

Affected Products

Product	Versions
xen xen	4.16
CPE cpe:2.3:o:xen:xen:4.16::::::x86: Remediation No remediation found in references.
fedoraproject fedora	36 37
CPE cpe:2.3:o:fedoraproject:fedora:36:::::::* cpe:2.3:o:fedoraproject:fedora:37:::::::* Remediation No remediation found in references.

Change History

13 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
May 5, 2025	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 4, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Jan 20, 2023	Modified Analysis	[email protected]
Nov 24, 2022	CVE Modified	[email protected]
Nov 9, 2022	CVE Modified	[email protected]
Nov 4, 2022	Initial Analysis	[email protected]
Nov 1, 2022	CVE Modified	[email protected]
Nov 1, 2022	CVE Modified	[email protected]