PT-2026-63391

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.22.0 through 1.25.1 Description A remote unauthenticated client can terminate the entire resolver process using a single DNS-over-QUIC DoQ connection and one normal DNS query. This occurs when ngtcp2 conn writev...

PT-2026-63373

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.16.2 through 1.25.1 Description An issue exists within the ghost domain names family of attacks where an adversary controlling a ghost zone can extend the ghost domain window for A/AAAA glue records. By sending a...

Oracle Linux 10 : unbound (ELSA-2026-23231)

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-23231 advisory. - Fix CVE-2026-42534: Jostle logic bypass degrades resolution performance - Fix CVE-2026-41292: DoS via excessive EDNS options - Add upstream unit te...

PT-2026-63385

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.25.0 through 1.25.1 Description A memory corruption issue exists when the software is under pressure and configured with an access-control-view and either the respip or rpz modules, alongside a module capable of...

PT-2026-63383

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions prior to 1.25.2 Description When the unwanted-reply-threshold is enabled and set to a value greater than zero, the software is susceptible to a cache clearing attack. A malicious actor controlling a delegation that...

PT-2026-63386

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.18.0 through 1.25.1 Description When the software listens on a 'proxy-protocol-port' interface with answer-cookie: yes, the RFC 9018 server-cookie SipHash is computed using the proxy's wire address rather than the...

PT-2026-63393

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.20.0 through 1.25.1 Description An issue exists when the software is configured with serve-expired: yes and serve-expired-client-timeout is greater than discard-timeout where discard-timeout is greater than 0. In...

PT-2026-63372

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.22.0 through 1.25.1 Description Client terminated DNS-over-QUIC DoQ queries are not accounted for properly, leading to an inflation of the waiting number of replies for in-flight resolution queries. This causes a...

PT-2026-63378

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.6.0 through 1.25.1 Description A flaw exists where a replay of a wildcard rrset Resource Record Set can be briefly marked as DNSSEC secure based solely on RRSIG Resource Record Signature validation and stored in t...

PT-2026-63377

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.7.0 through 1.25.1 Description Insufficient validation of the RRSIG.Labels field and premature cache writes during RFC 8198 aggressive NSEC processing enable cache poisoning. An attacker controlling a single...

PT-2026-63384

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.4.22 through 1.25.1 Description An issue exists where the secrecy of the randomized UDP source port, used to increase entropy in DNS transactions, is undermined when resolver load balancing policies depend on the...

PT-2026-63388

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions 1.10.0 through 1.25.1 Description A remote client controlling a delegated domain can cause the daemon to crash, leading to a denial of service. This occurs when the serve-expired: yes setting is enabled alongside a...

PT-2026-63375

Name of the Vulnerable Software and Affected Versions NLnet Labs Unbound versions prior to 1.25.2 Description Applications using libunbound configured with the unwanted-reply-threshold parameter may be abruptly terminated. This occurs when the threshold is reached and libunbound attempts to call...

EulerOS Virtualization 2.10.1 : unbound (EulerOS-SA-2026-2841)

According to the versions of the unbound packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead ...

Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-7.6)

The version of AOS installed on the remote host is prior to 7.6. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-7.6 advisory. - NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of...

EulerOS Virtualization 2.12.0 : unbound (EulerOS-SA-2026-2809)

According to the versions of the unbound packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the authority section...

EulerOS Virtualization 2.10.0 : unbound (EulerOS-SA-2026-2872)

According to the versions of the unbound packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : NLnet Labs Unbound up to and including version 1.25.0 has a denial of service vulnerability in the DNSSEC validator that can lead ...

Oracle Linux 10 : unbound (ELSA-2026-36320)

The remote Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-36320 advisory. - Fix CVE-2026-42534: Jostle logic bypass degrades resolution performance - Fix CVE-2026-41292: DoS via excessive EDNS options - Add upstream unit te...

EulerOS Virtualization 2.12.1 (EulerOS-SA-2026-2763)

According to the versions of the packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the authority section...

Important: unbound

Issue Overview: NLnet Labs Unbound 1.19.1 up to and including version 1.25.0 has a vulnerability in the DNSSEC validator that enables denial of service and possible remote code execution as a result of deep copying a data structure and erroneously overwriting a destination pointer. An adversary c...