CVE-2026-9640

Description

A privilege escalation vulnerability exists in LXD from 6.0 before 6.9, 5.21.0 before 5.21.5, and 5.0.0 before 5.0.7 regarding the handling of project-restriction policies during snapshot restoration.. An authenticated project operator in a restricted multi-tenant environment can bypass policy restrictions by importing a maliciously crafted instance backup containing restricted configuration keys within a snapshot. When the snapshot is restored, these restricted keys are applied to the live instance without policy validation. Starting the modified instance grants the operator unauthorized host root access.

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Produits concernés

• Canonical LXD

Scores CVSS

Faiblesses (CWE)

• CWE-863

Références

• https://github.com/canonical/lxd/pull/18301 Issue TrackingPatch
• https://github.com/canonical/lxd/pull/18303 Issue TrackingPatch
• https://github.com/canonical/lxd/pull/18304 Issue TrackingPatch
• https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552 Exploit
• https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552 Exploit

Ailleurs

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