CVE-2022-42327

 

Published at: - 01-11-2022 02:15

Last modified: - 20-01-2023 03:39

Total changes: - 4

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

 

Verification logic

 

Reference

• https://xenbits.xenproject.org/xsa/advisory-412.txt
• http://xenbits.xen.org/xsa/advisory-412.html
• [oss-security] 20221101 Xen Security Advisory 412 v2 (CVE-2022-42327) - x86: unintended memory sharing between guests-Mailing List, Patch, Third Party Advisory
• FEDORA-2022-07438e12df-Mailing List, Third Party Advisory
• FEDORA-2022-9f51d13fa3-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2022-42327

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures