CVE-2026-12080

Name	CVE-2026-12080
Description	A flaw was found in the QEMU Guest Agent (qga). A local unprivileged user can exploit a vulnerability in the guest-ssh-add-authorized-keys command handler by manipulating symbolic links. This can occur either through a deterministic directory-symlink bypass or a Time-of-Check to Time-of-Use (TOCTOU) file-symlink race. Successful exploitation allows the attacker to gain ownership of arbitrary root-owned files or directories, leading to root access. This vulnerability requires an external management layer (e.g., libvirt) to trigger the affected code path.
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)	bullseye	1:5.2+dfsg-11+deb11u3	vulnerable
	bullseye (security)	1:5.2+dfsg-11+deb11u5	vulnerable
	bookworm	1:7.2+dfsg-7+deb12u18	vulnerable
	bookworm (security)	1:7.2+dfsg-7+deb12u15	vulnerable
	trixie	1:10.0.11+ds-0+deb13u1	vulnerable
	trixie (security)	1:10.0.2+ds-2+deb13u1	vulnerable
	forky, sid	1:11.0.3+ds-2	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)

[trixie] - qemu <no-dsa> (Minor issue)
https://gitlab.com/qemu-project/qemu/-/work_items/3929