What is CVE-2026-42490?

CVE-2026-42490 is a medium-severity vulnerability in Xen, classified under Improper Locking. CVSS score: 6.5/10. Published 2026-06-18.

How severe is CVE-2026-42490?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Xen

CVE-2026-42490

[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 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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-2026-42490?: CVE-2026-42490 is a medium-severity vulnerability in Xen, classified under Improper Locking. CVSS score: 6.5/10. Published 2026-06-18.
How severe is CVE-2026-42490?: Medium severity. CVSS v3 base score is 6.5 out of 10.