Vulnerability details

CVE-2026-12411

Canonical LXD

Broken Access Control in Canonical LXD DevLXD API

CVSS 3.1

8.4High

Official 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 scores

Score	Version	Source	Vector
8.4High	3.1	CVEProject cvelistV5 (CNA) (canonical)	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N`

Affected products

Vendor	Product	Versions	Source
Canonical	LXD	6.6 ≤ v < 6.9	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/canonical/lxd/pull/18585 patch
https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp vdb-entryvendor-advisory

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Details

Published: 2026-06-26
Last updated: 2026-06-26
State: Published
Assigner (CNA): canonical

Exploit prediction (EPSS)

0.23%

Probability of exploitation in 30 days

14.6%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: Proof of concept
Technical impact: Total

Weaknesses (CWE)

CWE-639
Authorization bypass through User-Controlled key
CWE-862
Missing Authorization