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… (CVE-2026-81627)
Severity: mediumType: VulnerabilityCVE-2026-81627
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.
EPSS 0.2%top 92%
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… (CVE-2026-81627)
0
MediumVulnerabilityCVE-2026-81627gcveosvubuntu-cve-2026-81627cve-2026-81627ubuntu-pro-14-04-ltsubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-24-04-ltsubuntu-26-04-lts
Published: 09/18/2026 (09/18/2026, 11:17:00 UTC)
Source: GCVE Database
Product: qemu
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.
CVSS v3.1
Score 8.2high
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected software
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=esm-infra-legacy/trustyAffected versions
=1.5.0+dfsg-3ubuntu5=1.5.0+dfsg-3ubuntu6=1.6.0+dfsg-2ubuntu1=1.6.0+dfsg-2ubuntu2=1.6.0+dfsg-2ubuntu3=1.6.0+dfsg-2ubuntu4=1.7.0+dfsg-2ubuntu1=1.7.0+dfsg-2ubuntu2=1.7.0+dfsg-2ubuntu3=1.7.0+dfsg-2ubuntu4=1.7.0+dfsg-2ubuntu5=1.7.0+dfsg-2ubuntu7=1.7.0+dfsg-2ubuntu8=1.7.0+dfsg-2ubuntu9=1.7.0+dfsg-3ubuntu1~ppa1=1.7.0+dfsg-3ubuntu1=1.7.0+dfsg-3ubuntu2=1.7.0+dfsg-3ubuntu3=1.7.0+dfsg-3ubuntu4=1.7.0+dfsg-3ubuntu5=1.7.0+dfsg-3ubuntu6=1.7.0+dfsg-3ubuntu7=2.0.0~rc1+dfsg-0ubuntu1=2.0.0~rc1+dfsg-0ubuntu2=2.0.0~rc1+dfsg-0ubuntu3=2.0.0~rc1+dfsg-0ubuntu3.1=2.0.0+dfsg-2ubuntu1=2.0.0+dfsg-2ubuntu1.1=2.0.0+dfsg-2ubuntu1.2=2.0.0+dfsg-2ubuntu1.3=2.0.0+dfsg-2ubuntu1.5=2.0.0+dfsg-2ubuntu1.6=2.0.0+dfsg-2ubuntu1.7=2.0.0+dfsg-2ubuntu1.8=2.0.0+dfsg-2ubuntu1.9=2.0.0+dfsg-2ubuntu1.10=2.0.0+dfsg-2ubuntu1.11=2.0.0+dfsg-2ubuntu1.13=2.0.0+dfsg-2ubuntu1.14=2.0.0+dfsg-2ubuntu1.15=2.0.0+dfsg-2ubuntu1.16=2.0.0+dfsg-2ubuntu1.17=2.0.0+dfsg-2ubuntu1.18=2.0.0+dfsg-2ubuntu1.19=2.0.0+dfsg-2ubuntu1.20=2.0.0+dfsg-2ubuntu1.21=2.0.0+dfsg-2ubuntu1.22=2.0.0+dfsg-2ubuntu1.24=2.0.0+dfsg-2ubuntu1.25=2.0.0+dfsg-2ubuntu1.26=2.0.0+dfsg-2ubuntu1.27=2.0.0+dfsg-2ubuntu1.28=2.0.0+dfsg-2ubuntu1.29=2.0.0+dfsg-2ubuntu1.30=2.0.0+dfsg-2ubuntu1.31=2.0.0+dfsg-2ubuntu1.32=2.0.0+dfsg-2ubuntu1.33=2.0.0+dfsg-2ubuntu1.34=2.0.0+dfsg-2ubuntu1.35=2.0.0+dfsg-2ubuntu1.36=2.0.0+dfsg-2ubuntu1.38=2.0.0+dfsg-2ubuntu1.39=2.0.0+dfsg-2ubuntu1.40=2.0.0+dfsg-2ubuntu1.41=2.0.0+dfsg-2ubuntu1.42=2.0.0+dfsg-2ubuntu1.43=2.0.0+dfsg-2ubuntu1.44=2.0.0+dfsg-2ubuntu1.45=2.0.0+dfsg-2ubuntu1.46=2.0.0+dfsg-2ubuntu1.47=2.0.0+dfsg-2ubuntu1.47+esm1=2.0.0+dfsg-2ubuntu1.47+esm2=2.0.0+dfsg-2ubuntu1.47+esm3=2.0.0+dfsg-2ubuntu1.47+esm4=2.0.0+dfsg-2ubuntu1.47+esm6
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=esm-infra-legacy/xenialAffected versions
=1:2.3+dfsg-5ubuntu9=1:2.3+dfsg-5ubuntu10=1:2.4+dfsg-4ubuntu1=1:2.4+dfsg-4ubuntu2=1:2.4+dfsg-4ubuntu3=1:2.4+dfsg-5ubuntu3=1:2.5+dfsg-1ubuntu2=1:2.5+dfsg-1ubuntu3=1:2.5+dfsg-1ubuntu4=1:2.5+dfsg-1ubuntu5=1:2.5+dfsg-5ubuntu1=1:2.5+dfsg-5ubuntu2=1:2.5+dfsg-5ubuntu4=1:2.5+dfsg-5ubuntu6=1:2.5+dfsg-5ubuntu7=1:2.5+dfsg-5ubuntu10=1:2.5+dfsg-5ubuntu10.1=1:2.5+dfsg-5ubuntu10.2=1:2.5+dfsg-5ubuntu10.3=1:2.5+dfsg-5ubuntu10.4=1:2.5+dfsg-5ubuntu10.5=1:2.5+dfsg-5ubuntu10.6=1:2.5+dfsg-5ubuntu10.7=1:2.5+dfsg-5ubuntu10.8=1:2.5+dfsg-5ubuntu10.9=1:2.5+dfsg-5ubuntu10.10=1:2.5+dfsg-5ubuntu10.11=1:2.5+dfsg-5ubuntu10.13=1:2.5+dfsg-5ubuntu10.14=1:2.5+dfsg-5ubuntu10.15=1:2.5+dfsg-5ubuntu10.16=1:2.5+dfsg-5ubuntu10.20=1:2.5+dfsg-5ubuntu10.21=1:2.5+dfsg-5ubuntu10.22=1:2.5+dfsg-5ubuntu10.24=1:2.5+dfsg-5ubuntu10.25=1:2.5+dfsg-5ubuntu10.26=1:2.5+dfsg-5ubuntu10.28=1:2.5+dfsg-5ubuntu10.29=1:2.5+dfsg-5ubuntu10.30=1:2.5+dfsg-5ubuntu10.31=1:2.5+dfsg-5ubuntu10.32=1:2.5+dfsg-5ubuntu10.33=1:2.5+dfsg-5ubuntu10.34=1:2.5+dfsg-5ubuntu10.35=1:2.5+dfsg-5ubuntu10.36=1:2.5+dfsg-5ubuntu10.37=1:2.5+dfsg-5ubuntu10.38=1:2.5+dfsg-5ubuntu10.39=1:2.5+dfsg-5ubuntu10.40=1:2.5+dfsg-5ubuntu10.41=1:2.5+dfsg-5ubuntu10.42=1:2.5+dfsg-5ubuntu10.43=1:2.5+dfsg-5ubuntu10.44=1:2.5+dfsg-5ubuntu10.45=1:2.5+dfsg-5ubuntu10.46=1:2.5+dfsg-5ubuntu10.47=1:2.5+dfsg-5ubuntu10.48=1:2.5+dfsg-5ubuntu10.49=1:2.5+dfsg-5ubuntu10.51=1:2.5+dfsg-5ubuntu10.51+esm1=1:2.5+dfsg-5ubuntu10.51+esm2=1:2.5+dfsg-5ubuntu10.51+esm3=1:2.5+dfsg-5ubuntu10.51+esm4
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=esm-infra/bionicAffected versions
=1:2.10+dfsg-0ubuntu3=1:2.10+dfsg-0ubuntu4=1:2.10+dfsg-0ubuntu5=1:2.11+dfsg-1ubuntu1=1:2.11+dfsg-1ubuntu2=1:2.11+dfsg-1ubuntu4=1:2.11+dfsg-1ubuntu5=1:2.11+dfsg-1ubuntu6=1:2.11+dfsg-1ubuntu7=1:2.11+dfsg-1ubuntu7.1=1:2.11+dfsg-1ubuntu7.2=1:2.11+dfsg-1ubuntu7.3=1:2.11+dfsg-1ubuntu7.4=1:2.11+dfsg-1ubuntu7.5=1:2.11+dfsg-1ubuntu7.6=1:2.11+dfsg-1ubuntu7.7=1:2.11+dfsg-1ubuntu7.8=1:2.11+dfsg-1ubuntu7.9=1:2.11+dfsg-1ubuntu7.10=1:2.11+dfsg-1ubuntu7.12=1:2.11+dfsg-1ubuntu7.13=1:2.11+dfsg-1ubuntu7.14=1:2.11+dfsg-1ubuntu7.15=1:2.11+dfsg-1ubuntu7.17=1:2.11+dfsg-1ubuntu7.18=1:2.11+dfsg-1ubuntu7.19=1:2.11+dfsg-1ubuntu7.20=1:2.11+dfsg-1ubuntu7.21=1:2.11+dfsg-1ubuntu7.22=1:2.11+dfsg-1ubuntu7.23=1:2.11+dfsg-1ubuntu7.25=1:2.11+dfsg-1ubuntu7.26=1:2.11+dfsg-1ubuntu7.27=1:2.11+dfsg-1ubuntu7.28=1:2.11+dfsg-1ubuntu7.29=1:2.11+dfsg-1ubuntu7.31=1:2.11+dfsg-1ubuntu7.32=1:2.11+dfsg-1ubuntu7.33=1:2.11+dfsg-1ubuntu7.34=1:2.11+dfsg-1ubuntu7.35=1:2.11+dfsg-1ubuntu7.36=1:2.11+dfsg-1ubuntu7.37=1:2.11+dfsg-1ubuntu7.38=1:2.11+dfsg-1ubuntu7.39=1:2.11+dfsg-1ubuntu7.40=1:2.11+dfsg-1ubuntu7.41=1:2.11+dfsg-1ubuntu7.42=1:2.11+dfsg-1ubuntu7.42+esm1=1:2.11+dfsg-1ubuntu7.42+esm2=1:2.11+dfsg-1ubuntu7.42+esm5=1:2.11+dfsg-1ubuntu7.42+esm6
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=esm-infra/focalAffected versions
=1:4.0+dfsg-0ubuntu9=1:4.0+dfsg-0ubuntu10=1:4.2-1ubuntu1=1:4.2-1ubuntu2=1:4.2-3ubuntu1=1:4.2-3ubuntu2=1:4.2-3ubuntu3=1:4.2-3ubuntu4=1:4.2-3ubuntu5=1:4.2-3ubuntu6=1:4.2-3ubuntu6.1=1:4.2-3ubuntu6.2=1:4.2-3ubuntu6.3=1:4.2-3ubuntu6.4=1:4.2-3ubuntu6.5=1:4.2-3ubuntu6.6=1:4.2-3ubuntu6.7=1:4.2-3ubuntu6.8=1:4.2-3ubuntu6.9=1:4.2-3ubuntu6.10=1:4.2-3ubuntu6.11=1:4.2-3ubuntu6.12=1:4.2-3ubuntu6.14=1:4.2-3ubuntu6.15=1:4.2-3ubuntu6.16=1:4.2-3ubuntu6.17=1:4.2-3ubuntu6.18=1:4.2-3ubuntu6.19=1:4.2-3ubuntu6.21=1:4.2-3ubuntu6.23=1:4.2-3ubuntu6.24=1:4.2-3ubuntu6.25=1:4.2-3ubuntu6.26=1:4.2-3ubuntu6.27=1:4.2-3ubuntu6.28=1:4.2-3ubuntu6.29=1:4.2-3ubuntu6.30=1:4.2-3ubuntu6.30+esm1=1:4.2-3ubuntu6.30+esm2=1:4.2-3ubuntu6.30+esm3
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=jammyAffected versions
=1:6.0+dfsg-2expubuntu1=1:6.0+dfsg-2expubuntu2=1:6.0+dfsg-2expubuntu4=1:6.2+dfsg-2ubuntu5=1:6.2+dfsg-2ubuntu6=1:6.2+dfsg-2ubuntu6.1=1:6.2+dfsg-2ubuntu6.2=1:6.2+dfsg-2ubuntu6.3=1:6.2+dfsg-2ubuntu6.4=1:6.2+dfsg-2ubuntu6.5=1:6.2+dfsg-2ubuntu6.6=1:6.2+dfsg-2ubuntu6.7=1:6.2+dfsg-2ubuntu6.8=1:6.2+dfsg-2ubuntu6.9=1:6.2+dfsg-2ubuntu6.10=1:6.2+dfsg-2ubuntu6.11=1:6.2+dfsg-2ubuntu6.12=1:6.2+dfsg-2ubuntu6.13=1:6.2+dfsg-2ubuntu6.14=1:6.2+dfsg-2ubuntu6.15=1:6.2+dfsg-2ubuntu6.16=1:6.2+dfsg-2ubuntu6.17=1:6.2+dfsg-2ubuntu6.18=1:6.2+dfsg-2ubuntu6.19=1:6.2+dfsg-2ubuntu6.21=1:6.2+dfsg-2ubuntu6.22=1:6.2+dfsg-2ubuntu6.23=1:6.2+dfsg-2ubuntu6.24=1:6.2+dfsg-2ubuntu6.25=1:6.2+dfsg-2ubuntu6.26=1:6.2+dfsg-2ubuntu6.27=1:6.2+dfsg-2ubuntu6.28=1:6.2+dfsg-2ubuntu6.29=1:6.2+dfsg-2ubuntu6.30=1:6.2+dfsg-2ubuntu6.31
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=nobleAffected versions
=1:8.0.4+dfsg-1ubuntu3=1:8.0.4+dfsg-1ubuntu4=1:8.0.4+dfsg-1ubuntu5=1:8.1.3+ds-1ubuntu2=1:8.2.1+ds-1ubuntu1=1:8.2.1+ds-1ubuntu8=1:8.2.1+ds-1ubuntu9=1:8.2.2+ds-0ubuntu1=1:8.2.2+ds-0ubuntu1.2=1:8.2.2+ds-0ubuntu1.4=1:8.2.2+ds-0ubuntu1.5=1:8.2.2+ds-0ubuntu1.6=1:8.2.2+ds-0ubuntu1.7=1:8.2.2+ds-0ubuntu1.8=1:8.2.2+ds-0ubuntu1.9=1:8.2.2+ds-0ubuntu1.10=1:8.2.2+ds-0ubuntu1.11=1:8.2.2+ds-0ubuntu1.12=1:8.2.2+ds-0ubuntu1.13=1:8.2.2+ds-0ubuntu1.14=1:8.2.2+ds-0ubuntu1.15=1:8.2.2+ds-0ubuntu1.16=1:8.2.2+ds-0ubuntu1.17=1:8.2.2+ds-0ubuntu1.18
qemu
pkg:deb/ubuntu/qemu?arch=source&distro=resoluteAffected versions
=1:10.1.0+ds-5ubuntu2=1:10.1.0+ds-5ubuntu3=1:10.1.0+ds-5ubuntu4=1:10.1.0+ds-5ubuntu5=1:10.2.1+ds-1ubuntu1=1:10.2.1+ds-1ubuntu2=1:10.2.1+ds-1ubuntu3=1:10.2.1+ds-1ubuntu3.1=1:10.2.1+ds-1ubuntu3.2
qemu-hwe
pkg:deb/ubuntu/qemu-hwe?arch=source&distro=resoluteAffected versions
=1:10.2.1+ds-1ubuntu2=1:10.2.1+ds-1ubuntu4=1:10.2.1+ds-1ubuntu4.2=1:10.2.1+ds-1ubuntu4.3
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-81627
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab4be4cf7a7c54106f0697b
Added to database: 09/24/2026, 06:08:12 UTC
Last updated: 09/24/2026, 18:47:33 UTC
Views: 4
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