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.
CSIRTS triage
- What
- Multiple security issues in Incus allow bypass of security restrictions and privilege escalation.
- Who is affected
- Systems running Incus container and virtual machine manager.
- Urgency
- High; privilege escalation and security bypass are critical risks.
- Action
- Update Incus to the patched version referenced in DSA-6407-1.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.42% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all EPSS-scored CVEs.
Advisory coverage (2)
- criticalCVE-2026-63125: Incus is a system container and virtual machine manager. Prior to version 7.3.0, an unprivileg…nvd · 2026-08-21
- unknownDSA-6407-1 incus - security updatedebian · 2026-07-31
External references
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