CVE-2026-85526

Impact

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 packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

Weakness classification

References

• NVD record
• CVE.org record
• https://github.com/canonical/lxd-private/pull/103
• https://github.com/canonical/lxd-private/pull/104
• https://github.com/canonical/lxd-private/pull/105
• https://github.com/canonical/lxd-private/pull/84
• https://github.com/canonical/lxd-private/pull/87
• https://github.com/canonical/lxd/security/advisories/GHSA-h85r-gjgx-g2rv