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HIGH · 8.4

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 PA...

Vulnerability 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 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
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
CanonicalLxd>= 6.6, < 6.9

Related Weaknesses (CWE)

CWE-639CWE-862

References

FAQ

What is CVE-2026-12411?

CVE-2026-12411 is a vulnerability with a CVSS score of 8.4 (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 PA...

How severe is CVE-2026-12411?

CVE-2026-12411 has been rated HIGH with a CVSS base score of 8.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-12411?

Check the references section above for vendor advisories and patch information. Affected products include: Canonical Lxd.