CVE-2026-81627: Qemu-kvm: vapic writable rom alias can escape the option-rom window and expose locked smram

Overview

Severity

High (CVSS 8.2)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-Sep

Released

2026-10-01

EPSS Score

0.19% (percentile: 7.9%)

Affected Products (1)

Other

• 21780-17084

Revision History

• 2026-10-01: Information published.