CVE-2026-9640
highpriority · track · 0OT risk · elevatedEPSS 0.006 · 50 %ileEUUSEPSS · scored 2026-10-28
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–7.2
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (6)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (12)
External citations — patches, advisories, analysis.
- https://github.com/canonical/lxd/pull/18301cnnvd
- https://github.com/canonical/lxd/pull/18303cnnvd
- https://github.com/canonical/lxd/pull/18304cnnvd
- https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552cnnvd
- https://github.com/canonical/lxd/pull/18301enisa_euvd
- https://github.com/canonical/lxd/pull/18303enisa_euvd
- https://github.com/canonical/lxd/pull/18304enisa_euvd
- https://github.com/canonical/lxd/security/advisories/GHSA-ppq7-4492-5552enisa_euvd
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