dnsmasq < 2.93 Heap-Based Buffer Overflow (CVE-2026-12725)

The version of dnsmasq installed on the remote host is prior to 2.93. It is, therefore, affected by a heap-based buffer overflow vulnerability. When DNSSEC validation and query logging are both enabled, logging of DS or DNSKEY replies containing unsupported algorithm or digest types can cause...

RHSA-2026:34508 Red Hat Security Advisory: dnsmasq security update

Bulletin has no description...

OPENSUSE-SU-2026:11172-1 dnsmasq-2.93-2.1 on GA media

These are all security issues fixed in the dnsmasq-2.93-2.1 package on the GA media of openSUSE Tumbleweed...

dnsmasq: RRSIG rdlen underflow leading to heap OOB read

A heap out-of-bounds read vulnerability was discovered in dnsmasq's DNSSEC validation. When processing RRSIG records, dnsmasq calculates the signature length by subtracting the fixed field size from the record's declared data length. A crafted RRSIG record with a data length smaller than the fixe...

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...

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: DHCPv6 CLID buffer overflow in helper process

A heap buffer overflow was discovered in dnsmasq's DHCP script helper process. When processing DHCPv6 client identifiers CLIDs, the helper hex-encodes the raw CLID bytes into a fixed-size buffer without length validation. Since DHCPv6 CLIDs can be up to 65,535 bytes, a crafted DHCPv6 packet can...

Important: Red Hat Security Advisory: dnsmasq security update

An update for dnsmasq 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...

dnsmasq: dnsmasq: heap buffer overflow in cache via NAME_ESCAPE expansion

A heap buffer overflow was discovered in dnsmasq's DNS cache. When processing DNS responses, dnsmasq expands certain characters into longer escape sequences, but the cache buffer is not sized to hold the expanded result. A specially crafted DNS response can overflow this buffer, potentially...

SUSE-SU-2026:22454-1 Security update for dnsmasq

This update for dnsmasq fixes the following issues Update to 2.93: - CVE-2026-12725: heap buffer overflow in logquery when logging unsupported DS/DNSKEY replies bsc1268764...

SUSE-SU-2026:22496-1 Security update for dnsmasq

This update for dnsmasq fixes the following issues Update to 2.93: - CVE-2026-12725: heap buffer overflow in logquery when logging unsupported DS/DNSKEY replies bsc1268764. Changes for dnsmasq: CVE-2026-12725, bsc1268764: Heap buffer overflow in logquery when logging unsupported DS/DNSKEY replies...

OPENSUSE-SU-2026:21192-1 Security update for dnsmasq

This update for dnsmasq fixes the following issues Update to 2.93: - CVE-2026-12725: heap buffer overflow in logquery when logging unsupported DS/DNSKEY replies bsc1268764. Changes for dnsmasq: CVE-2026-12725, bsc1268764: Heap buffer overflow in logquery when logging unsupported DS/DNSKEY replies...

OPENSUSE-SU-2026:11116-1 dnsmasq-2.93-1.1 on GA media

These are all security issues fixed in the dnsmasq-2.93-1.1 package on the GA media of openSUSE Tumbleweed...

SUSE CVE-2026-12969

An out-of-bounds read vulnerability exists in dnsmasq's findsoa function in src/rfc1035.c. When parsing NS section records, extractname is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can...

Oracle Linux 9 : dnsmasq (ELSA-2026-19373)

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-19373 advisory. - Prevent overflow in extractname function CVE-2026-2291 - Prevent DoS in DNSSEC validation CVE-2026-4890 - Prevent out-of-bounds read in DNSSEC...

Linux Distros Unpatched Vulnerability : CVE-2026-12969

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An out-of-bounds read vulnerability exists in dnsmasq's findsoa function in src/rfc1035.c. When parsing NS section records, extractname is called with...

DEBIAN-CVE-2026-12969

An out-of-bounds read vulnerability exists in dnsmasq's findsoa function in src/rfc1035.c. When parsing NS section records, extractname is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can...

CVE-2026-12969

An out-of-bounds read vulnerability exists in dnsmasq's findsoa function in src/rfc1035.c. When parsing NS section records, extractname is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can...

UBUNTU-CVE-2026-12969

An out-of-bounds read vulnerability exists in dnsmasq's findsoa function in src/rfc1035.c. When parsing NS section records, extractname is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can...

EUVD-2026-38449

An out-of-bounds read vulnerability exists in dnsmasq's findsoa function in src/rfc1035.c. When parsing NS section records, extractname is called with extrabytes=0, failing to validate that 10 additional bytes exist for fixed-length DNS record fields. A remote attacker controlling a DNS zone can...