Bug 2521013 (CVE-2026-63125)

Summary: CVE-2026-63125 incus: Incus vulnerable to root RCE via image backup.yaml symlink
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: urgent    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Incus, a container and virtual machine manager. A crafted container image can trick the daemon into writing to arbitrary host files via a symlink in backup.yaml, potentially leading to root-level command execution on the host.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2524269    
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Description OSIDB Bzimport 2026-08-21 15:11:02 UTC 
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.