Bug 2521017 (CVE-2026-62941) - CVE-2026-62941 incus: Incus: Cross-project instance copy bypasses target project restrictions via TOCTOU in config merge
Summary: CVE-2026-62941 incus: Incus: Cross-project instance copy bypasses target proj...
Keywords:
Status: NEW
Alias: CVE-2026-62941
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2524274
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-21 15:13 UTC by OSIDB Bzimport
Modified: 2026-08-26 08:01 UTC (History)
0 users

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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.
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