CVE-2022-42327 Privilege escalation in xen

What is CVE-2022-42327?

CVE-2022-42327 is a high-severity vulnerability in Fedoraproject Fedora, published on 1 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

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.

Weakness: CWE-284

Which versions are affected by CVE-2022-42327?

It affects 2 products.

Products include Fedoraproject Fedora, Xen Xen.

How do I fix CVE-2022-42327?

Apply the vendor's patch.

Is CVE-2022-42327 being exploited?

There is no known exploitation of CVE-2022-42327 in the wild and no public exploit code.

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All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2022-42327, DEBIAN-CVE-2022-42327, GHSA-rgfj-62rr-5vf5, UBUNTU-CVE-2022-42327.