Qemu-kvm: vapic writable rom alias can escape the option-rom window and expose locked smram
CVE-2026-81627 is fixed in 33 products on 1 platform, first by DEBIAN-CVE-2026-81627, released October 6, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| qemu · Debian 14 | 1:11.1.2+ds-1 | DEBIAN-CVE-2026-81627 | Oct 6, 2026 |
| qemu · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu · opensuse-leap 16.0 | 10.0.13-160000.2.1 | OPENSUSE-SU-2026:22047-1 | Oct 7, 2026 |
| qemu · sles 16.0 | 10.0.13-160000.2.1 | SUSE-SU-2026:24159-1 | Oct 7, 2026 |
| qemu-common · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-common-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-debugsource · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-docs · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-guest-agent · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-guest-agent-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-img · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-img-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-kvm · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-kvm-core · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-linux-user · opensuse-leap 16.0 | 10.0.13-160000.2.1 | OPENSUSE-SU-2026:22047-1 | Oct 7, 2026 |
| qemu-linux-user · sles 16.0 | 10.0.13-160000.2.1 | SUSE-SU-2026:24159-1 | Oct 7, 2026 |
| qemu-pr-helper · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-pr-helper-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-system-aarch64 · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-system-aarch64-core · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-system-aarch64-core-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-system-x86 · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-system-x86-core · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-system-x86-core-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-tests · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-tests-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-tools · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-tools-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-user · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-user-binfmt · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-user-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-user-static · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-user-static-aarch64 · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-user-static-aarch64-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-user-static-x86 · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
| qemu-user-static-x86-debuginfo · amzn 2023 | 2:11.0.0-4.amzn2023 | ALAS2023-2026-3241 | Nov 7, 2026 |
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