CVE-2026-12411

HIGH

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 v3.1 Score

8.4
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Published: 6/26/2026Modified: 7/2/2026

Related Intelligence (1)

CRITICALVulnerability

NVD CRITICAL: CVE-2026-12411 — Broken Access Control in the devLXDInstancePatchHandler component of Canonical L...

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.

CVE-2026-12411
NIST NVD

References (3)

https://github.com/canonical/lxd/pull/18585Issue TrackingPatchhttps://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xpExploitVendor Advisoryhttps://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xpExploitVendor Advisory