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Vulnerability · Published Nov 1, 2022 · Assigned by XEN

CVE-2022-42327

High 7.1

In plain English

A high-severity improper access control in xen from Xen. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.2%top 84.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20xen4.16.2-r1ALPINE-CVE-2022-42327
Alpine:v3.21xen4.16.2-r1ALPINE-CVE-2022-42327
Alpine:v3.22xen4.16.2-r1ALPINE-CVE-2022-42327
Alpine:v3.23xen4.16.2-r1ALPINE-CVE-2022-42327
Alpine:v3.24xen4.16.2-r1ALPINE-CVE-2022-42327
Debian:12xen4.16.2+90-g0d39a6d1ae-1DEBIAN-CVE-2022-42327
Debian:13xen4.16.2+90-g0d39a6d1ae-1DEBIAN-CVE-2022-42327
Debian:14xen4.16.2+90-g0d39a6d1ae-1DEBIAN-CVE-2022-42327
Ubuntu:22.04:LTSxenno fix listedUBUNTU-CVE-2022-42327
Ubuntu:24.04:LTSxenno fix listedUBUNTU-CVE-2022-42327
Ubuntu:25.10xenno fix listedUBUNTU-CVE-2022-42327
Ubuntu:26.04:LTSxenno fix listedUBUNTU-CVE-2022-42327
Ubuntu:26.10xenno fix listedUBUNTU-CVE-2022-42327

Affected products (as reported)

VendorProductVersions
Xen xen see references

Weakness: CWE-284 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References