CVE-2026-63125

Incus vulnerable to root RCE via image backup.yaml symlink

State: Published
Severity: 9.9 Critical
Published: Aug 21, 2026
Updated: Aug 21, 2026
Reserved: Jul 15, 2026

Description

Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileged, project-confined Incus user (a non-admin TLS/RBAC identity with `can_create_images` and `can_create_instances`) can execute arbitrary code as root on the host. A crafted image ships `backup.yaml` as a symlink to a host file. When the root daemon writes the instance's backup file, it follows the symlink. Version 7.3.0 patches the issue.

Scores

CVSS	Score	Vector	Source
3.1	9.9 Critical	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-59 Improper Link Resolution Before File Access ('Link Following')
CWE-61 UNIX Symbolic Link (Symlink) Following

Affected Products

Product	Versions
incuslxc	< 7.3.0Affected

References

https://github.com/lxc/incus/security/advisories/GHSA-6rqx-22hc-qm36

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.