dnsmasq: Broken ECS source validation bypass

A validation bypass was discovered in dnsmasq's RFC 7871 client subnet ECS handling. When verifying ECS source information in DNS responses, dnsmasq passes the OPT record length instead of the full packet length to the validation function.This causes all internal bounds checks to fail, completely...

dnsmasq: Broken ECS source validation bypass

A validation bypass was discovered in dnsmasq's RFC 7871 client subnet ECS handling. When verifying ECS source information in DNS responses, dnsmasq passes the OPT record length instead of the full packet length to the validation function.This causes all internal bounds checks to fail, completely...

SUSE CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

CVE-2026-4893

A validation bypass was discovered in dnsmasq's RFC 7871 client subnet ECS handling. When verifying ECS source information in DNS responses, dnsmasq passes the OPT record length instead of the full packet length to the validation function.This causes all internal bounds checks to fail, completely...

EUVD-2026-29155

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

AZL-86760 CVE-2026-4893 affecting package dnsmasq for versions less than 2.92-1

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

ALPINE-CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

CVE-2026-4893

CVE-2026-4893 is an information-disclosure vulnerability in dnsmasq. A crafted DNS packet containing RFC 7871 client-subnet information allows remote attackers to bypass source checks. Affected component: dnsmasq’s DNS handling. Underlying impact per sources is information disclosure; exploitatio...

CVE-2026-4893 CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

CVE-2026-4893 CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

CVE-2026-4893 CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

UBUNTU-CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

CVE-2026-4893

An information disclosure vulnerability in dnsmasq allows remote attackers to bypass source checks via a crafted DNS packet with RFC 7871 client subnet information...

PT-2026-39701

Name of the Vulnerable Software and Affected Versions dnsmasq affected versions not specified Description An information disclosure issue allows remote attackers to bypass source checks by using a crafted DNS packet containing RFC 7871 client subnet information. Recommendations At the moment, the...

EulerOS Virtualization 2.12.0 : unbound (EulerOS-SA-2026-1524)

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 1.24.1 is vulnerable to possible domain hijack attacks. Promiscuous NS RRSets that...

ISC BIND 9.11.3-S1 < 9.18.38-S1 / 9.18.11-S1 < 9.18.38-S1 / 9.20.9-S1 < 9.20.11-S1 Vulnerability (cve-2025-40776)

The version of ISC BIND installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the cve-2025-40776 advisory. - A named caching resolver that is configured to send ECS EDNS Client Subnet options may be vulnerable to a cache-poisoning...

EulerOS Virtualization 2.10.1 : unbound (EulerOS-SA-2026-1149)

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 1.24.0 is vulnerable to possible domain hijack attacks. Promiscuous NS RRSets that...

EulerOS Virtualization 2.10.0 : unbound (EulerOS-SA-2026-1201)

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 1.24.0 is vulnerable to possible domain hijack attacks. Promiscuous NS RRSets that...