CVE-2026-12411

Description

Broken Access Control in the devLXDInstancePatchHandler component of Canonical LXD allows an untrusted guest to mount, read, and overwrite another guest's custom storage volume via a crafted device PATCH request over /dev/lxd when security.devlxd.management.volumes is enabled.

CVSS Vector

References

• https://github.com/canonical/lxd/pull/18585
• https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp
• https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp