CVE-2026-12411

EUVD-2026-39788
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
canonicalCNA
8.4 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
canonicallxd
6.6 ≤
𝑥
< 6.9
CNA
Common Weakness Enumeration
References
https://github.com/canonical/lxd/pull/18585
https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp
https://github.com/canonical/lxd/security/advisories/GHSA-hhf9-qw4v-72xp