NSEC3-X

DISCLAIMER: This project was generated by Artificial Intelligence AI but has undergone a rigorous "Human-in-the-Loop" HITL process. This means the code has been reviewed and refactored by a human software engineer, the architectural design was human-directed, and a basic security audit was...

dnsmasq: NSEC bitmap parsing infinite loop

A denial of service vulnerability was discovered in dnsmasq's DNSSEC validation. When parsing NSEC and NSEC3 bitmap records, the window iteration logic fails to account for the 2-byte window header when advancing through the bitmap data. A specially crafted DNS response with a zero-length bitmap...

bind: bind9: Unexpected exit with NSEC and NSEC3 both present

If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof...

bind: bind9: Incorrect acceptance of NSEC3 records

BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses...

bind: bind9: Incorrect acceptance of NSEC3 records

BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses...

bind: bind9: Unexpected exit with NSEC and NSEC3 both present

If a provably insecure domain is covered by both an NSEC and NSEC3 record at the parent, and there exist an RRSIG for only one of these types, then BIND may exit unexpectedly with an assertion while validating this proof...

CentOS Linux 7 [TuxCare] Security Update: bind / bind-chroot / bind-devel / bind-export-devel / etc Multiple Vulnerabilities (CENTOS7:CLSA-2026:1793163099)

The CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare CENTOS7:CLSA-2026:1793163099 advisory. - BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses...

NSEC3-Encloser-Attack

NSEC3-Encloser-Attack Zonefile Generation This project generates DNS zonefiles with custom NSEC3 parameters to reproduce and evaluate the attacks in CVE-2023-50868. Requirements Python3 tested on Python3.10 Installed Python dependencies: cryptography 42.0.5 dnspython 2.6.1 Components lib: Python...

CLEANSTART-2026-GZ56197 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 D...

CVE-2023-50868 affects multiple packages. 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...

dnsmasq: NSEC bitmap parsing infinite loop

A denial of service vulnerability was discovered in dnsmasq's DNSSEC validation. When parsing NSEC and NSEC3 bitmap records, the window iteration logic fails to account for the 2-byte window header when advancing through the bitmap data. A specially crafted DNS response with a zero-length bitmap...

OESA-2026-4608 bind 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 ...

OESA-2026-4607 bind 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 ...

Oracle Linux 9 : bind (ELSA-2026-89745)

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-89745 advisory. - Fix CVE-2026-19662: NOQNAME proof use-after-free could crash recursive resolver. - Prevent assertion failure in dns64 mode with break-dnssec yes CVE-2026-196...

CLSA-2026-1792590954 bind: Fix of 3 CVEs

CVE-2026-19941: require an NSEC wildcard proof to be signed by the same zone as the validated NOQNAME proof - CVE-2026-75029: skip duplicate records of singleton types when parsing a message - CVE-2026-77119: ignore NSEC3 records from zones that do not enclose the DS name when proving an insecure...

AlmaLinux 9.2 [TuxCare] Security Update: bind / bind-chroot / bind-devel / bind-dnssec-doc / etc Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1792590954)

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1792590954 advisory. - An inapplicable NSEC record may be accepted by a named resolver as proof that no wildcard exists, which could allow an attacker at...

Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Bind vulnerabilities (USN-8929-1)

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8929-1 advisory. Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain malformed...

CLSA-2026-1791226662 bind: Fix of 2 CVEs

CVE-2026-80274: fix an assertion failure in a validating resolver when a wildcard answer carries a signed NSEC3 proof and an unsigned NSEC or a signed NSEC and an unsigned NSEC3 at the same owner name; the NOQNAME proof type accepted by the validator is now recorded and used both when caching and...

CLSA-2026-1790905625 bind: Fix of 2 CVEs

CVE-2026-80274: fix an assertion failure in a validating resolver when a wildcard answer carries a signed NSEC3 proof and an unsigned NSEC or a signed NSEC and an unsigned NSEC3 at the same owner name; the NOQNAME proof type accepted by the validator is now recorded and used both when caching and...

K000163710: BIND vulnerability CVE-2026-10723

Security Advisory Description BIND may accept incorrect child-zone NSEC3 records as valid, which could allow an attacker to forge authenticated NXDOMAIN responses. This issue affects BIND 9 versions 9.18.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through...

USN-8929-1 bind9 vulnerabilities

Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain malformed DNSKEY records. A remote attacker could possibly use this issue to cause Bind to consume resources, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS...