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

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

https://cvefeed.io/rssfeed/latest.atom / Fri, 09/18/2026 - 13:32
CVE ID :CVE-2026-81627
Published : Sept. 18, 2026, 10:54 a.m. | 14 minutes ago
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.
Severity: 6.7 | MEDIUM
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