CVE-2026-85185 Canonical LXD - Path Traversal

Canonical LXD 4.0.2 and later contain a path traversal in the btrfs storage driver caused by crafted subvolume paths with ../ sequences, letting authenticated clients with instance creation permission delete or write arbitrary files as root, exploit requires authenticated client with instance creation permission.

CVSS base score 9.6 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Path Traversal
Impact
File System Write, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H
Published
28 September 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to versions 4.0.14, 5.0.10, 5.21.8, 6.10 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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