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CVE-2022-42327

HIGH
7.1
CVSS Score
Published: November 1, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 05:04 AM UTC
2 products affected across 2 vendorsFedoraXen

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Severity
HIGH7.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
3637
Xen· Xenwordpress-plugin
95%
4.16
Vendor states this is fixed in consult Xen advisory XSA-412 (unknown)

References (6)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-284

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