CVE-2026-50243

A flaw in Unbound's respip module fails to verify the security status of incoming DNS answers when using response-ip rules or RPZ files. A remote attacker can exploit this by spoofing DNS answers to bypass DNSSEC protections and trigger unauthorized rewrites, redirecting clients to unintended...

AlmaLinux 9 : bind9.18 (ALSA-2026:55442)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:55442 advisory. bind9: bind: Potential wildcard CNAME RPZ policy bypass CVE-2026-11331 bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field CVE-2026-133...

CVE-2026-55717

A flaw in Unbound allows a remote attacker controlling a delegated domain to trigger a NULL pointer dereference and crash the daemon. Exploitation occurs when serve-expired: yes and specific response-ip or RPZ rules are configured, resulting in a denial of service. Mitigation Ensure serve-expired...

CVE-2026-50248

A flaw in Unbound allows a remote attacker to replace an authenticated or Response Policy Zone RPZ by spoofing DNS records for configured primary hostnames. This enables the attacker to impersonate the primary server, leading to DNS cache poisoning or traffic redirection. Mitigation Configure...

RLSA-2026:55437 Important: bind security update

The Berkeley Internet Name Domain BIND is an implementation of the Domain Name System DNS protocols. BIND includes a DNS server named; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server is operating correctly. Security Fixes:...

RLSA-2026:55442 Important: bind9.18 security update

BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. BIND includes a DNS server named, which resolves host names to IP addresses; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server ...

bind9.18 security update

An update is available for bind9.18. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Na...

bind: bind: Denial of Service via long query names in RPZ processing

A flaw was found in BIND. A remote attacker can send specially crafted, excessively long query names to a resolver configured with Response Policy Zones RPZ and wildcard policies. Improper handling of the resulting error condition can cause the service to terminate unexpectedly, leading to a Deni...

Important: Red Hat Security Advisory: bind9.18 security update

An update for bind9.18 is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from...

bind: bind: Denial of Service via long query names in RPZ processing

A flaw was found in BIND. A remote attacker can send specially crafted, excessively long query names to a resolver configured with Response Policy Zones RPZ and wildcard policies. Improper handling of the resulting error condition can cause the service to terminate unexpectedly, leading to a Deni...

bind: bind: Denial of Service via long query names in RPZ processing

A flaw was found in BIND. A remote attacker can send specially crafted, excessively long query names to a resolver configured with Response Policy Zones RPZ and wildcard policies. Improper handling of the resulting error condition can cause the service to terminate unexpectedly, leading to a Deni...

Important: Red Hat Security Advisory: bind security update

An update for bind is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for ea...

ALSA-2026:55442 Important: bind9.18 security update

BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. BIND includes a DNS server named, which resolves host names to IP addresses; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server ...

RHEL 9 : bind9.18 (RHSA-2026:55442)

"The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:55442 advisory. BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. BIND includes a DNS server named, which...

RHEL 10 : bind (RHSA-2026:55437)

"The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:55437 advisory. The Berkeley Internet Name Domain BIND is an implementation of the Domain Name System DNS protocols. BIND includes a DNS server named...

RHEL 9 : bind (RHSA-2026:55441)

"The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:55441 advisory. The Berkeley Internet Name Domain BIND is an implementation of the Domain Name System DNS protocols. BIND includes a DNS server named...

RockyLinux 9 : bind9.18 (RLSA-2026:55442)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:55442 advisory. bind9: bind: Potential wildcard CNAME RPZ policy bypass CVE-2026-11331 bind: bind9: DNSSEC Validation Bypass via Out-of-Zone NSEC Next Field...

ALSA-2026:55437 Important: bind security update

The Berkeley Internet Name Domain BIND is an implementation of the Domain Name System DNS protocols. BIND includes a DNS server named; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server is operating correctly. Security Fixes:...

Important: bind9.18 security update

BIND Berkeley Internet Name Domain is an implementation of the DNS Domain Name System protocols. BIND includes a DNS server named, which resolves host names to IP addresses; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server ...

RLSA-2026:54510 Important: bind security update

The Berkeley Internet Name Domain BIND is an implementation of the Domain Name System DNS protocols. BIND includes a DNS server named; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server is operating correctly. Security Fixes:...