CVE-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.
- Published Sep 18, 2026
- CVSS 8.2 high
- 0.2% chance of exploitation in the next 30 days (EPSS)