CVE-2026-62430
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Jul 28, 2026
Vendor
unknown
Description
Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen needs to cache the guest chosen index, and one of the usages of the index didn't take the necessary locking to avoid concurrent changes. As a result, a guest could change the index after it being checked, causing a subsequent out-of-bound read access to the contents of an array.