Accesses to the CMOS memory contents are done using an indirect IO port pair. (CVE-2026-62430)
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.
Accesses to the CMOS memory contents are done using an indirect IO port pair. (CVE-2026-62430)
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.
CVSS v3.1
Weaknesses
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-w4qm-qcx6-wmw8
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-62430"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a6941de9c2644c7f86c54ca
Added to database: 07/28/2026, 23:57:18 UTC
Last updated: 07/29/2026, 03:21:59 UTC
Views: 2
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