unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options

A flaw was found in Unbound, a Domain Name System DNS resolver. A remote attacker could trigger a heap overflow by sending specially crafted DNS reply packets. This occurs when Unbound attempts to encode multiple Name Server Identifier NSID or Extension Mechanisms for DNS EDNS Cookie options, or...

Photon OS 5.0: Unbound PHSA-2026-5.0-0862

An update of the unbound package has been released. %NASLMINLEVEL 80900 C Tenable, Inc. The descriptive text and package checks in this plugin were extracted from VMware Security Advisory PHSA-2026-5.0-0862. The text itself is copyright C VMware, Inc. include'compat.inc'; if description...

Photon OS 4.0: Unbound PHSA-2026-4.0-1027

An update of the unbound package has been released. %NASLMINLEVEL 80900 C Tenable, Inc. The descriptive text and package checks in this plugin were extracted from VMware Security Advisory PHSA-2026-4.0-1027. The text itself is copyright C VMware, Inc. include'compat.inc'; if description...

AlmaLinux 10 : unbound (ALSA-2026:23231)

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:23231 advisory. unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options CVE-2026-42944 unbound: Unbound DNSSEC Validator Denial of Service via...

PT-2026-46004

Mercusys AC12G EU V1 with firmware AC12GEU V1 200909 responds to version.bind CHAOS TXT queries, disclosing the DNS resolver software version unbound 1.22.0, aiding targeted attacks against known vulnerabilities...

Critical Photon OS Security Update - PHSA-2026-5.0-91-0862

Updates of 'python3', 'linux-esx', 'expat', 'unbound', 'linux' packages of Photon OS have been released...

CVE-2026-36618

Mercusys AC12G EU V1 with firmware AC12GEUV1200909 responds to version.bind CHAOS TXT queries, disclosing the DNS resolver software version unbound 1.22.0, aiding targeted attacks against known vulnerabilities...

Critical Photon OS Security Update - PHSA-2026-5.0-0862

Updates of 'unbound', 'linux', 'wireshark', 'linux-esx', 'python3', 'expat', 'python3-pip' packages of Photon OS have been released...

Critical Photon OS Security Update - PHSA-2026-5.0-92-0862

Updates of 'python3', 'linux-esx', 'unbound', 'linux', 'wireshark', 'python3-pip' packages of Photon OS have been released...

Critical Photon OS Security Update - PHSA-2026-4.0-1027

Updates of 'linux', 'unbound' packages of Photon OS have been released...

CVE-2026-36618

Mercusys AC12G EU V1 with firmware AC12GEUV1200909 responds to version.bind CHAOS TXT queries, disclosing the DNS resolver software version unbound 1.22.0, aiding targeted attacks against known vulnerabilities...

CVE-2026-36618

Mercusys AC12G (EU) V1 devices (firmware AC12G(EU)_V1_200909) are affected. The issue arises because the DNS resolver (unbound 1.22.0) reveals its version when responding to version.bind CHAOS TXT queries, which can aid targeted attacks against known vulnerabilities. The vulnerability pertains to...

EUVD-2026-34155

Mercusys AC12G EU V1 with firmware AC12GEUV1200909 responds to version.bind CHAOS TXT queries, disclosing the DNS resolver software version unbound 1.22.0, aiding targeted attacks against known vulnerabilities...

Fedora 43 : unbound (2026-3223ded15e)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3223ded15e advisory. Update to 1.25.1 rhbz2480119 - Fix CVE-2026-33278, Possible remote code execution during DNSSEC validation. Thanks to Qifan Zhang, Palo Alto Network...

RockyLinux 10 : unbound (RLSA-2026:18556)

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:18556 advisory. unbound: DNSBomb vulnerability CVE-2024-33655 unbound: Unbound domain hijacking via promiscuous records CVE-2025-11411 Tenable has extracted the...

CVE-2026-36618

Mercusys AC12G EU V1 with firmware AC12GEUV1200909 responds to version.bind CHAOS TXT queries, disclosing the DNS resolver software version unbound 1.22.0, aiding targeted attacks against known vulnerabilities...

Critical Photon OS Security Update - PHSA-2026-5.0-90-0862

Updates of 'linux-esx', 'unbound' packages of Photon OS have been released...

USN-8282-2 unbound vulnerabilities

USN-8282-1 fixed vulnerabilities in Unbound. This update provides the corresponding updates for CVE-2026-41292 in Ubuntu 18.04 LTS and Ubuntu 20.04 LTS and CVE-2026-42959, CVE-2026-42960 in Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Original advisory details: Andr...

USN-8282-2: Unbound vulnerabilities

USN-8282-1 fixed vulnerabilities in Unbound. This update provides the corresponding updates for CVE-2026-41292 in Ubuntu 18.04 LTS and Ubuntu 20.04 LTS and CVE-2026-42959, CVE-2026-42960 in Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. Original advisory details: Andr...

[SECURITY] Fedora 43 Update: unbound-1.25.1-1.fc43

Unbound is a validating, recursive, and caching DNSSEC resolver. The C implementation of Unbound is developed and maintained by NLnet Labs. It is based on ideas and algorithms taken from a java prototype developed by Verisign labs, Nominet, Kirei and ep.net. Unbound is designed as a set of modula...