CVE-2026-63297

Description

An authorization bypass vulnerability in LXD due to a timing flaw during configuration merging allows an authenticated attacker to bypass target project restrictions during cross-project instance copies. When copying an instance to a target project, LXD performs restriction checks before configuration merging is complete, creating a time-of-check to time-of-use (TOCTOU) condition. An attacker can exploit this flaw to copy instances with disallowed high-privilege configurations into restricted projects, bypassing security controls.

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Produits concernés

• Canonical LXD

Scores CVSS

Faiblesses (CWE)

• CWE-367
• CWE-863

Références

• https://github.com/canonical/lxd/security/advisories/GHSA-v989-qw7w-xvg4 Vendor AdvisoryExploitMitigation
• https://github.com/canonical/lxd/security/advisories/GHSA-v989-qw7w-xvg4 Vendor AdvisoryExploitMitigation

Ailleurs

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