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VULNERABILITIES

CVE-2026-81627 Details

Description

A flaw was found in QEMU. The VAPIC setup hypercall in hw/i386/vapic.c does not validate that the writable RAM alias remains within the option ROM window. A privileged guest user on a Q35/KVM machine can position this alias over locked SMRAM, bypassing chipset D_LCK protection and injecting code into System Management Mode memory.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.2 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://gitlab.com/qemu-project/qemu/-/work_items/4206 CISA-ADP
https://access.redhat.com/security/cve/CVE-2026-81627 [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2536950 [email protected]
https://gitlab.com/qemu-project/qemu/-/work_items/4206 [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-787Out-of-bounds Write[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-81627
NVD Published Date:
Sep 18, 2026
NVD Last Modified:
Sep 21, 2026
Source:
[email protected]
CVE-2026-81627 Details - Not Deferred