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...

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...

unbound security update

An update is available for unbound. This update affects Rocky Linux 10. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The unbound packages provide a validating, recursive, and caching DNS or...

CVE-2026-33811

A flaw was found in the net package of Go golang, specifically when using the LookupCNAME function with the cgo DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name CNAME response. This can trigger a double-free of C memory, leading to a crash and a Denial of...

Amazon Linux 2 : golist, --advisory ALAS2-2026-3308 (ALAS-2026-3308)

The version of golist installed on the remote host is prior to 0.10.1-10. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3308 advisory. When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a...

Amazon Linux 2023 : git-lfs (ALAS2023-2026-1722)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1722 advisory. Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value refresh. A new GODEBU...

Amazon Linux 2 : runc, --advisory ALAS2DOCKER-2026-125 (ALASDOCKER-2026-125)

The version of runc installed on the remote host is prior to 1.3.4-5. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2DOCKER-2026-125 advisory. When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a...

Important: credentials-fetcher

Issue Overview: crypto/tls: handshake messages may be processed at the incorrect encryption level CVE-2025-61730 When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash. CVE-2026-33811 When processing HTTP/2 SETTINGS frames,...

TencentOS Server 3: bind (TSSA-2026:0362)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0362 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:...

NLnet Labs Unbound 访问控制错误漏洞

NLnet Labs Unbound is a high-performance DNS resolver open-sourced by NLnet Labs. In versions 1.16.2 to 1.25.0 of NLnet Labs Unbound, there is an access control vulnerability. This vulnerability stems from a phantom domain attack. It allows attackers to control phantoms and query the vulnerable...

Moderate: Red Hat Security Advisory: unbound security update

An update for unbound is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from t...

BIT-GOLANG-2026-33811 Crash when handling long CNAME response in net

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash...

Linux Distros Unpatched Vulnerability : CVE-2026-33811

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash. CVE-2026-33811 Note that Nessus...

DEBIAN-CVE-2026-33811

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash...

CVE-2026-33811

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash...

CVE-2026-33811

When using LookupCNAME with the cgo DNS resolver, a very long CNAME response can trigger a double-free of C memory and a crash...

Security Bulletin: Use-After-Free Vulnerability in c-ares read_answers() Function (v1.32.3–v1.34.4) affects watsonx.data

Summary CVE-2025-31498 - A use-after-free vulnerability exists in c-ares v1.32.3–v1.34.4 within the readanswers function. It can occur when processanswer re-enqueues queries under certain DNS conditions, potentially leading to crashes or unexpected behavior. This can affect watsonx.data...

Unity Linux 20.1070e Security Update: unbound (UTSA-2026-007096)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-007096 advisory. A multi-vendor cache poisoning vulnerability named 'Rebirthday Attack' has been discovered in caching resolvers that support EDNS Client Subnet ECS. Unbound is also...

EUVD-2026-19582

Generation of Predictable Numbers or Identifiers vulnerability in Erlang/OTP kernel inetres, inetdb modules allows DNS Cache Poisoning. The built-in DNS resolver inetres uses a sequential, process-global 16-bit transaction ID for UDP queries and does not implement source port randomization...