Qemu-kvm: vapic writable rom alias can escape the option-rom window and expose locked smram
Historical advisory recorded 30 Oct 2026 22:45:26 UTC. Read the latest advisory.
cve-program · CVE-2026-81627
PublishedA 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.
Read the publisher's advisoryAffected versions, risk and source history
cve-program · CVE-2026-81627
PublishedQemu-kvm: vapic writable rom alias can escape the option-rom window and expose locked smram
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.
- Source published
- 18 Sep 2026 10:54:03 UTC
- Source modified
- 30 Oct 2026 20:05:12 UTC
- Saved here
- 30 Oct 2026 22:45:26 UTC
- Source terms
- CVE Program Terms of Use
Original source record · Cite this exact observation · Complete original publisher JSON
Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 8.2 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H