CVE-2022-42327

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.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory xen.org Vendor Advisory xenproject.org
Affected: Xen xen
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2022-42327?
CVE-2022-42327 has been scored as a high severity vulnerability.
How to fix CVE-2022-42327?
To fix CVE-2022-42327, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-42327 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-42327 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-42327?
CVE-2022-42327 affects Xen xen.
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