Critical severity · published Jun 26, 2026
CVE-2026-12411
Broken Access Control in Canonical LXD DevLXD API
9.6
CVSS
0.3%
EPSS
No
On KEV
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
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LX
lxd · Canonical
6.6 before 6.9 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12411
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12411
Issue Tracking
https://github.com/canonical/lxd/pull/18585
Exploit
https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp
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