Description
Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PowerDNS | Recursor | ≤ 4.6.5, ≤ 4.7.4, ≤ 4.8.3 | — |
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-recursor | 4.8.4-1 | — |
| Debian 13 | pdns-recursor | 4.8.4-1 | — |
| Debian 12 | pdns-recursor | 4.8.4-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | pdns-recursor | No fix yet | — |
| Ubuntu 26.04 LTS | pdns-recursor | No fix yet | — |
| Ubuntu 25.10 | pdns-recursor | No fix yet | — |
| Ubuntu 24.04 LTS | pdns-recursor | 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-recursor | No fix yet | — |
| Ubuntu Pro 20.04 LTS | pdns-recursor | No fix yet | — |
| Ubuntu Pro 18.04 LTS | pdns-recursor | No fix yet | — |
| Ubuntu Pro 16.04 LTS | pdns-recursor | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP5 | pdns-recursor | 4.8.6-bp155.2.3.1 | openSUSE-SU-2024:0048-1 |
| SUSE Package Hub 15 SP4 | pdns-recursor | 4.6.6-bp154.2.6.1 | openSUSE-SU-2023:0101-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | pdns-recursor | 4.8.4-1.1 | openSUSE-SU-2024:12838-1 |
| openSUSE Leap 15.5 | pdns-recursor | 4.8.6-bp155.2.3.1 | openSUSE-SU-2024:0048-1 |
| openSUSE Leap 15.4 | pdns-recursor | 4.6.6-bp154.2.6.1 | openSUSE-SU-2023:0101-1 |
Advisories 4
- openSUSE-SU-2024:0048-1 Security update for pdns-recursor SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2023:0101-1 Security update for pdns-recursor SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12838-1 pdns-recursor-4.8.4-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0794 PowerDNS: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Apr 4, 2023
References
- https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/