CVE-2026-855269.9CriticalCWE-22
CVE-2026-85526: Canonical LXD vulnerability
Canonical · LXD
Vendor fix available · Affected: Canonical LXD · Exploitation: not established
ExploitationNot established
Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)
- In CISA KEV: not seen
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public: not seen
- Not establishedNothing in the sources we check
0.5%probability of exploitation in the next 30 days
45th percentile
050100
Higher than 45% of scored CVEs
9.9CriticalCVSS 3.1
LowMediumHighCrit.
DescriptionNVD
Path traversal in the Btrfs storage driver (unpackVolume) in Canonical LXD on Linux allows an authenticated user with instance creation privileges to delete or replace arbitrary files and directories on the host filesystem as root via a crafted subvolumes[].path entry in backup/optimized_header.yaml during a btrfs optimized backup import.
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Canonical
- Published
- September 2026
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 29 Sep.
- Critical LXD Flaws Let Users Write to Hosts as RootSecurityOnline · first in our coverage · mentions it in passing
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