CVE-2026-9640

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.

CVSS 3.1

7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-25)

CWE

CWE-863

Published

2026-06-26

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• canonical:lxd

References

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

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