← Back

Recursor

recursor

Vendor: Powerdns • 50 CVEs

CVEs (50)

CVE
VENDORS
PRODUCTS
UPDATED
PUBLISHED
CVSS
1Powerdns
1Recursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
4.9 MEDIUM· v3
N/A· v2
If you use the zoneToCache function with a malicious authoritative server, an attacker can send a zone that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
1Powerdns
1Recursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
4.9 MEDIUM· v3
N/A· v2
An RPZ sent by a malicious authoritative server can result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service.
1Powerdns
1Recursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
5.9 MEDIUM· v3
N/A· v2
An attacker can send replies that result in a null pointer dereference, caused by a missing consistency check and leading to a denial of service. Cookies are disabled by default.
1Powerdns
1Recursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
5.9 MEDIUM· v3
N/A· v2
A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
1Powerdns
3Authoritative
DnsdistRecursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
7.5 HIGH· v3
N/A· v2
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
1Powerdns
1Recursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
5.0 MEDIUM· v3
N/A· v2
Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning R...Show more
Having many concurrent transfers of the same RPZ can lead to inconsistent RPZ data, use after free and/or a crash of the recursor. Normally concurrent transfers of the same RPZ zone can only occur with a malfunctioning RPZ provider.Show less
1Powerdns
1Recursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
7.5 HIGH· v3
N/A· v2
By publishing and querying a crafted zone an attacker can cause allocation of large entries in the negative and aggressive NSEC(3) caches.
1Powerdns
3Authoritative
DnsdistRecursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
7.5 HIGH· v3
N/A· v2
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
1Powerdns
1Recursor
Apr 27, 2026
Apr 22, 2026
N/A· v4
7.5 HIGH· v3
N/A· v2
An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.
1Powerdns
1Recursor
Apr 20, 2026
Feb 9, 2026
N/A· v4
5.3 MEDIUM· v3
N/A· v2
Crafted zones can lead to increased incoming network traffic.
1Powerdns
1Recursor
Apr 20, 2026
Feb 9, 2026
N/A· v4
5.3 MEDIUM· v3
N/A· v2
Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.
1Powerdns
1Recursor
Apr 20, 2026
Feb 9, 2026
N/A· v4
6.5 MEDIUM· v3
N/A· v2
Crafted delegations or IP fragments can poison cached delegations in Recursor.
1Powerdns
1Recursor
Apr 20, 2026
Feb 9, 2026
N/A· v4
8.2 HIGH· v3
N/A· v2
Crafted delegations or IP fragments can poison cached delegations in Recursor.
1Powerdns
1Recursor
Feb 19, 2026
Dec 9, 2025
N/A· v4
7.5 HIGH· v3
N/A· v2
An attacker can trigger the removal of cached records by sending a NOTIFY query over TCP.
1Powerdns
1Recursor
Feb 19, 2026
Dec 9, 2025
N/A· v4
5.3 MEDIUM· v3
N/A· v2
An attacker can trigger an assertion failure by requesting crafted DNS records, waiting for them to be inserted into the records cache, then send a query with qtype set to ANY.
6Debian
FedoraprojectIsc+3 more
8Active Iq Unified Manager
BindBootstrap Os+5 more
Dec 23, 2025
Feb 14, 2024
N/A· v4
7.5 HIGH· v3
N/A· v2
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in...Show more
The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the "NSEC3" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.Show less
8Fedoraproject
IscMicrosoft+5 more
13Bind
DnsmasqEnterprise Linux+10 more
Nov 4, 2025
Feb 14, 2024
N/A· v4
7.5 HIGH· v3
N/A· v2
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue...Show more
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG records, the protocol specification implies that an algorithm must evaluate all combinations of DNSKEY and RRSIG records.Show less
1Powerdns
1Recursor
Feb 13, 2025
Apr 4, 2023
N/A· v4
5.3 MEDIUM· v3
N/A· v2
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.
1Powerdns
1Recursor
Apr 3, 2025
Jan 21, 2023
N/A· v4
7.5 HIGH· v3
N/A· v2
A remote attacker might be able to cause infinite recursion in PowerDNS Recursor 4.8.0 via a DNS query that retrieves DS records for a misconfigured domain, because QName minimization is used in QM fallback mode. This is...Show more
A remote attacker might be able to cause infinite recursion in PowerDNS Recursor 4.8.0 via a DNS query that retrieves DS records for a misconfigured domain, because QName minimization is used in QM fallback mode. This is fixed in 4.8.1.Show less
2Fedoraproject
Powerdns
2Fedora
Recursor
Nov 21, 2024
Aug 23, 2022
N/A· v4
6.5 MEDIUM· v3
N/A· v2
PowerDNS Recursor up to and including 4.5.9, 4.6.2 and 4.7.1, when protobuf logging is enabled, has Improper Cleanup upon a Thrown Exception, leading to a denial of service (daemon crash) via a DNS query that leads to an...Show more
PowerDNS Recursor up to and including 4.5.9, 4.6.2 and 4.7.1, when protobuf logging is enabled, has Improper Cleanup upon a Thrown Exception, leading to a denial of service (daemon crash) via a DNS query that leads to an answer with specific properties.Show less