CVE-2026-85526GHSA-H85R-GJGX-G2RV
Path traversal via Btrfs optimized-backup subvolumes[].path enables root file/dir manipulation in LXD
- Published
- Last modified
- Status
- published
- Known exploitation
- Not listed in CISA KEV
- Fix
- Fixed in 4.0.14, 5.0.10, 5.21.8, 6.10
- Public exploit
- None on Exploit-DB
CISA SSVC
- Exploitation: poc
- Automatable: no
- Technical impact: total
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Decision points from CISA's Vulnrichment, assessed (SSVC 2.0.3).
SSVC documentationSummary
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.
Affected versions
- LXD
From 4.0.0 · fixed in 4.0.14; From 5.0.0 · fixed in 5.0.10; From 5.21.0 · fixed in 5.21.8; From 6.0 · fixed in 6.10