Description
An issue was discovered in OpenZFS through 2.0.3. When an NFS share is exported to IPv6 addresses via the sharenfs feature, there is a silent failure to parse the IPv6 address data, and access is allowed to everyone. IPv6 restrictions from the configuration are not applied.
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | zfs-linux | 2.2.2-1 | — |
| Debian 13 | zfs-linux | 2.2.2-1 | — |
| Debian 12 | zfs-linux | 2.1.11-1+deb12u1 | — |
| Debian 11 | zfs-linux | 2.0.3-9+deb11u2 | DLA-4114-1 |
| Debian 10 | zfs-linux | 0.7.12-2+deb10u3 | DLA-3766-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | zfs-linux | 2.1.5-1ubuntu6~22.04.2 | USN-6511-1 |
| Ubuntu 20.04 LTS | zfs-linux | 0.8.3-1ubuntu12.16 | USN-6511-1 |
| Ubuntu 16.04 LTS | zfs-linux | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | zfs-linux | No fix yet | — |
Advisories 3
- USN-6511-1 zfs-linux vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3766-1 zfs-linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-4114-1 zfs-linux - security update Debian Security (DSA / DLA) · Mar 9, 2026