Description
Knot Resolver through 5.5.1 may allow DNS cache poisoning when there is an attempt to limit forwarding actions by filters.
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 | knot-resolver | No fix yet | — |
| Debian 13 | knot-resolver | No fix yet | — |
| Debian 12 | knot-resolver | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | knot-resolver | No fix yet | — |
| Ubuntu 26.04 LTS | knot-resolver | No fix yet | — |
| Ubuntu 25.10 | knot-resolver | No fix yet | — |
| Ubuntu 24.04 LTS | knot-resolver | No fix yet | — |
| Ubuntu 20.04 LTS | knot-resolver | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | knot-resolver | No fix yet | — |
| Ubuntu Pro 18.04 LTS | knot-resolver | No fix yet | — |
| Ubuntu Pro 16.04 LTS | knot-resolver | No fix yet | — |