What is CVE-2026-62436?

CVE-2026-62436 is a medium-severity vulnerability in Xen, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.5/10. Published 2026-07-28.

How severe is CVE-2026-62436?

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

Vulnerability in Xen

CVE-2026-62436

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] With the introduction of Grant Table v2 came the requirement to be able to switch between versions. Switchin…

Vulnerability class: Race Condition

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

Affected products

Xen — versions consult Xen advisory XSA-501

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

security@xen.org

Frequently asked questions

What is CVE-2026-62436?: CVE-2026-62436 is a medium-severity vulnerability in Xen, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.5/10. Published 2026-07-28.
How severe is CVE-2026-62436?: Medium severity. CVSS v3 base score is 6.5 out of 10.