CVEvulnerability

CVE-2026-63297

9.9 CRITICAL Published 2026-08-12 Modified 2026-10-24 Official page ↗
Status
Analyzed
Published
2026-08-12
Last modified
2026-10-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.9 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weaknesses
CWE-367, CWE-863

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.

Affected configurations

• canonical lxd (>= 5.0.0 < 5.0.8) • canonical lxd (>= 5.1 < 5.21.6) • canonical lxd (>= 6.0 < 6.9)

Related

Weakness · CWE (2)

  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition weakness
  • CWE-863 Incorrect Authorization weakness

References