Description
An improper validation vulnerability in the instancePostMigration function in lxd/instance_post.go of LXD allows an authenticated attacker with can_create_instances permissions on a restricted project to bypass project-level security restrictions. When migrating an instance between projects, LXD fails to validate the instance's configuration against the target project's enforced restrictions (such as restricted.containers.lowlevel, restricted.devices.*, and restricted.networks.access). An attacker can exploit this by creating a disallowed or high-privilege instance in an unrestricted project and subsequently moving it into the restricted project.
Affected products
canonical: lxd
References3
- github.com/canonical/lxd/security/advisories/GHSA-5g5r-wh97-qcq2 Vendor AdvisoryExploitMitigation
- github.com/canonical/lxd/pull/18605 ExploitPatch
- github.com/canonical/lxd/pull/18651 Patch
Metrics
- CVSS 3.1
-
9.9
CRITICAL
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 46 · as of 12 November 2026
- CWE
- CWE-862
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