Bug 2521017 (CVE-2026-62941)

Summary: CVE-2026-62941 incus: Incus: Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: urgent Docs Contact:
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 race condition when copying instances across projects allows dangerous configuration keys to bypass project restrictions, enabling privilege escalation and container escape.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2524274    
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Description OSIDB Bzimport 2026-08-21 15:13:16 UTC 
Incus is a system container and virtual machine manager. Prior to version 7.3.0, when copying an instance across projects, the project restriction check (`AllowInstanceCreation`) runs BEFORE the source instance's configuration is merged into the request. Dangerous configuration keys (including `security.privileged`, `raw.lxc`, `raw.apparmor`) from the source instance are merged AFTER the check passes, bypassing all project restrictions on the target project. Version 7.3.0 patches the issue.