CVE-2026-63125

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.

CVSS v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

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

Configurations

No configuration.

History

15 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) Incus es un gestor de contenedores de sistema y máquinas virtuales. Antes de la versión 7.3.0, un usuario de Incus sin privilegios y confinado a un proyecto (una identidad TLS/RBAC no administradora con 'can_create_images' y 'can_create_instances') puede ejecutar código arbitrario como root en el host. Una imagen manipulada envía 'backup.yaml' como un enlace simbólico a un archivo del host. Cuando el demonio root escribe el archivo de copia de seguridad de la instancia, sigue el enlace simbólico. La versión 7.3.0 corrige el problema.

Information

Published : 2026-08-21 15:16

Updated : 2026-10-15 19:10

NVD link : CVE-2026-63125

Mitre link : CVE-2026-63125

CVE.ORG link : CVE-2026-63125

JSON object : View

Products Affected

No product.

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

CWE-61

UNIX Symbolic Link (Symlink) Following

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