UBUNTU-CVE-2026-85559
[Out-of-bounds read in Recursor findScopeZero]
Published Updated
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pdns-recursor vulnerabilities
Vulnerabilities published for pdns-recursor in the last 30 days: 7. Listed in the KEV catalogue: 0.
Vulnerabilities: 76
UBUNTU-CVE-2026-85558
[Recursor retains closed TCP client addresses until process exit]
Published UpdatedUBUNTU-CVE-2026-85557
[Single web client not doing TLS handshake monopolizes web access]
Published UpdatedUBUNTU-CVE-2026-85556
[Missing OPT RR owner-name validation bypasses ECS hardening]
Published UpdatedUBUNTU-CVE-2026-85555
[DNSSEC validation bypass and cache poisoning in PowerDNS Recursor via out-of-band NS resolution]
Published UpdatedUBUNTU-CVE-2026-73206
[A crafted DNS packet can cause a denial of service decompressing the DNS names in the packet]
Published UpdatedUBUNTU-CVE-2026-73205
[A malicious client can cause too many TCP connections in TIME_WAIT state]
Published UpdatedUBUNTU-CVE-2026-52682
[A crafted DNS packet can cause increased memory and CPU consumption]
Published UpdatedRRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation
RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation
Published UpdatedWildcard CNAME proof validation bypass
The issue is a DNSSEC validation bypass where wildcard expansion proofs (NSEC/NSEC3 records) are accepted without signature validation when the wildcard answer is a CNAME or DNAME record.
Published UpdatedPrefetch Feature Allows Persistent Ghost Domain Cache Poisoning Attack
If the auth responds very slowly and the records expire in between, the capping of TTLs is not enforced for lack of data. This does not happen on regular resolve as then then the child records are used immediately if not expired and thus valid, or the records are expired, and in that case not used. So this case can only happen if almost expired records are used to refresh the authoritative NS records.
Published UpdatedSpoofed answers can mark an authoritative non-EDNS capable
Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.
Published UpdatedZONEMD validation can be bypassed
An invalid zone might pass ZONEMD validation while it should not. This is only relevant if ZoneToCache is configured with ZONEMD validation.
Published UpdatedMissing input validation for catalog zones
Incomplete validation of the SOA record present in a catalog zone might lead to a crash.
Published UpdatedInsufficient input validation in ZoneToCache
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a crash of the Recursor due to insuffcient input validation.
Published UpdatedInformation about ECS zero scoped answers might leak to clients that use a specific ECS
ECS zero scoped answers are stored in the packet cache while they should not. This impacts only configurations that have ECS enabled;
Published UpdatedZoneToCache can poison the cache
A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache poisoning.
Published UpdatedInsufficient input validation of internal web server
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.
Published UpdatedInsufficient validation of cookie reply
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.
Published UpdatedNull pointer accces in aggressive NSEC(3) cache
A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
Published Updated
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