{"id":"CVE-2026-81627","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-81627","summary":"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…","details":"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":"2026-09-18T11:17:18.490","modified":"2026-09-18T19:06:08.407","cvss":{"score":6.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-81627"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536950"},{"type":"WEB","url":"https://gitlab.com/qemu-project/qemu/-/work_items/4206"},{"type":"WEB","url":"https://gitlab.com/qemu-project/qemu/-/work_items/4206"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-18T19:06:08.407"}}