Description
LXD before 2.0.2 uses world-readable permissions for /var/lib/lxd/zfs.img when setting up a loop based ZFS pool, which allows local users to copy and read data from arbitrary containers via unspecified vectors.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | lxd | 2.0.2-0ubuntu1~16.04.1 | USN-2988-1 |
Advisories 1
- USN-2988-1 lxd vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
References
- https://linuxcontainers.org/lxd/news/
- USN-2988-1 vendor-advisory