Bug 2531513 - CVE-2026-63343 incus: Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root [fedora-all]
Summary: CVE-2026-63343 incus: Arbitrary File Read/Write: metadata.yaml symlink in ima...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: incus
Version: rawhide
Hardware: Unspecified
OS: Unspecified
urgent
urgent
Target Milestone: ---
Assignee: Neal Gompa
QA Contact:
URL:
Whiteboard: {"flaws": ["89a9c0de-9580-4580-8be8-0...
Depends On:
Blocks: CVE-2026-63343
TreeView+ depends on / blocked
 
Reported: 2026-09-10 15:39 UTC by aedmond
Modified: 2026-09-10 15:39 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


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Description aedmond 2026-09-10 15:39:28 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Incus is a system container and virtual machine manager. Prior to version 7.3.0, a malicious image containing a `metadata.yaml` symlink pointing to an arbitrary host path allows an authenticated Incus user to read or overwrite any file on the host as root via the instance metadata API. The `exec-output` and `templates/` paths were patched in a prior release using `Lstat` rejection and `os.OpenRoot` confinement; `metadata.yaml` was not included in either patch and remains exploitable. Version 7.3.0 patches the issue.


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