Vulnerability in Xen
CVE-2022-42327
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.
EPSS: 0.002 (13.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Xen — versions 4.16, consult Xen advisory XSA-412
- Fedoraproject Fedora — versions 36, 37
Weakness classification (CWE)
References
- security@xen.org (Vendor Advisory)
- security@xen.org (Patch, Vendor Advisory)
- security@xen.org (mailing-list, Patch, Mailing List, Third Party Advisory)
- security@xen.org (vendor-advisory)
- security@xen.org (vendor-advisory)
- security@xen.org (vendor-advisory)
Frequently asked questions
- What is CVE-2022-42327?
- CVE-2022-42327 is a high-severity vulnerability in Xen, classified under Improper Access Control. CVSS score: 7.1/10. Published 2022-11-01.
- How severe is CVE-2022-42327?
- High severity. CVSS v3 base score is 7.1 out of 10.