CVE-2026-63300

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.

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Produits concernés

• Canonical LXD

Scores CVSS

Faiblesses (CWE)

• CWE-862

Références

• https://github.com/canonical/lxd/pull/18605 ExploitPatch
• https://github.com/canonical/lxd/pull/18651 Patch
• https://github.com/canonical/lxd/security/advisories/GHSA-5g5r-wh97-qcq2 Vendor AdvisoryExploitMitigation

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories