CVE-2026-81627

Name	CVE-2026-81627
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
qemu (PTS)	bookworm	1:7.2+dfsg-7+deb12u18	vulnerable
	bookworm (security)	1:7.2+dfsg-7+deb12u15	vulnerable
	trixie	1:10.0.13+ds-0+deb13u1	vulnerable
	trixie (security)	1:10.0.2+ds-2+deb13u1	vulnerable
	forky	1:11.1.0+ds-2	vulnerable
	sid	1:11.1.1+ds-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
qemu	source	(unstable)	(unfixed)

Notes

https://gitlab.com/qemu-project/qemu/-/work_items/4206
Fixed by: https://gitlab.com/qemu-project/qemu/-/commit/d61c8a6fb7388486353aa267ba0d75b098f16662 (master)