Vulnerability Report

CVE-2026-12411

Title: LXD Broken Access Control in devLXDInstancePatchHandler

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2026-12411.

CWE Category CWE-639
Published Date Jun 26, 2026
Modified Date Jul 02, 2026
Exploit Status Not Found
Score 8.4 CVSS v3.1
Exploit Probability (EPSS)
0.21%

Vulnerability Summary

CVE-2026-12411: 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.

Impacted Vendors

L
linuxcontainers 1
C
canonical 1

Reference Links

https://github.com/canonical/lxd/pull/18585 https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.4
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.6
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-12411 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected Stack

No specific products linked.