lxd: 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...
CVE-2026-9640 is fixed in lxd on 1 platform by DEBIAN-CVE-2026-9640 (version 5.0.2+git20231211.1364ae4-9+deb13u7), released June 28, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| lxd · Debian 13.5 (trixie) | 5.0.2+git20231211.1364ae4-9+deb13u7 | DEBIAN-CVE-2026-9640 | Jun 28, 2026 |
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