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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | 4.16 |
| Fedoraproject | Fedora | 36 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2022/11/01/3Mailing ListPatchThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-412.htmlPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202402-07
- https://xenbits.xenproject.org/xsa/advisory-412.txtVendor Advisory
- http://www.openwall.com/lists/oss-security/2022/11/01/3Mailing ListPatchThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-412.htmlPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202402-07
- https://xenbits.xenproject.org/xsa/advisory-412.txtVendor Advisory
FAQ
What is CVE-2022-42327?
CVE-2022-42327 is a vulnerability with a CVSS score of 7.1 (HIGH). 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...
How severe is CVE-2022-42327?
CVE-2022-42327 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-42327?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Fedoraproject Fedora.