What is CVE-2026-42489?

CVE-2026-42489 is a medium-severity vulnerability in Xen, classified under Improper Locking. CVSS score: 5.3/10. Published 2026-06-18.

How severe is CVE-2026-42489?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Xen

CVE-2026-42489

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] To create and manage guests, domctl operations are used by the control domain, a possible Xenstore domain, or…

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H.

Affected products

Xen — versions consult Xen advisory XSA-492

Weakness classification (CWE)

CWE-667 — Improper Locking

References

security@xen.org

Frequently asked questions

What is CVE-2026-42489?: CVE-2026-42489 is a medium-severity vulnerability in Xen, classified under Improper Locking. CVSS score: 5.3/10. Published 2026-06-18.
How severe is CVE-2026-42489?: Medium severity. CVSS v3 base score is 5.3 out of 10.