CVE-2022-42327

highpriority · track · 28EPSS 0.002 · 15 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.24% (15th) EPSS

CVSS 7.1 · high

Is it mine?

10 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.5–7.1

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 1.8 · impact 5.2

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nsecondaryexploitability 1.8 · impact 5.2

v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-284US

affected products (10)

Products and version ranges known to be affected.

Citrix Systems Hypervisor 8.2 LTSR CU1all versionscert_bundDEcpe:/o:citrix:hypervisor:8.2_ltsr_cu1
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
Open Source Xen 4.13.xall versionscert_bundDEcpe:/o:xen:xen:4.13.x
Open Source Xen 4.15.xall versionscert_bundDEcpe:/o:xen:xen:4.15.x
Open Source Xen 4.16.xall versionscert_bundDEcpe:/o:xen:xen:4.16.x
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
fedoraproject fedora= 36nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
fedoraproject fedora= 37nvdUScpe:2.3:o:fedoraproject:fedora:*:*:*:*:*:*:*:*
xen xen= 4.16nvdUScpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-1939Xen: Mehrere SchwachstellenDeutsch2022-11-01csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Xen und Citrix Systems Hypervisor ausnutzen um einen Denial of Service zu verursachen, Informationen offenzulegen oder seine Rechte zu erweitern.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2022-11-01modified 2026-06-17

references (19)

External citations — patches, advisories, analysis.

scry

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