Description
A rogue primary server may cause file descriptor exhaustion and eventually a denial of service, when a PowerDNS secondary server forwards a DNS update request to it.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PowerDNS | Authoritative | 5.0.0 – < 5.0.4, 4.9.0 – < 4.9.14 | 5.0.4 |
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 | pdns | 5.0.4-1 | — |
| Debian 13 | pdns | 4.9.14-0+deb13u1 | — |
| Debian 12 | pdns | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | pdns | No fix yet | — |
| Ubuntu 26.04 LTS | pdns | No fix yet | — |
| Ubuntu 25.10 | pdns | No fix yet | — |
| Ubuntu 24.04 LTS | pdns | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | pdns | No fix yet | — |
| Ubuntu Pro 20.04 LTS | pdns | No fix yet | — |
| Ubuntu Pro 18.04 LTS | pdns | No fix yet | — |
| Ubuntu Pro 16.04 LTS | pdns | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | pdns | 5.0.4-r0 | — |
| Alpine v3.23 | pdns | 5.0.4-r0 | — |
Advisories 1
- WID-SEC-2026-1236 PowerDNS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 5, 2026