CVE-2026-12411

HIGH

Broken Access Control in Canonical LXD DevLXD API

Title source: cna
STIX 2.1

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.

References (2)

Core 2
Core References
Vendor Advisory vdb-entry vendor-advisory
Cross-guest volume hijack via DevLXD device patch
https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp
Patch patch
Security fixes from the 6.9 release
https://github.com/canonical/lxd/pull/18585

Scores

CVSS v3 8.4
EPSS 0.0021
EPSS Percentile 11.0%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-639 CWE-862
Status published
Products (2)
Canonical/lxd 6.6 - 6.9
canonical/lxd 6.6 - 6.9
Published Jun 26, 2026
Tracked Since Jun 26, 2026