CLEANSTART-2026-KY78316 dnsmasqs extract_name() function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-...

Multiple security vulnerabilities affect the dnsmasq package. dnsmasqs extractname function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS...

CLSA-2026-1788390417 dnsmasq: Fix of 2 CVEs

CVE-2023-50387, CVE-2023-50868: fix three adaptation defects in the vendor 2.90-onto-2.79 backport: uninitialized plen bounding extractname in the resource-limit log, rrstatus left as char while storing RRSIG TTL ceilings, and checkunsigned negated on the TCP path only...

MGASA-2026-0135 Updated dnsmasq packages fix security vulnerabilities

CVE-2026-2291: dnsmasqs extractname function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS. CVE-2026-4890: A Denial of Service DoS...

ALPINE-CVE-2026-2291

dnsmasqs extractname function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS...

AZL-86763 CVE-2026-2291 affecting package dnsmasq for versions less than 2.92-1

dnsmasqs extractname function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS...

CVE-2026-2291

dnsmasqs extractname function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS...

CVE-2026-2291: Undefined Security Weakness

dnsmasqs extractname function can be abused to cause a heap buffer overflow, allowing an attacker to inject false DNS cache entries, which could result in DNS lookups to redirect to an attacker-controlled IP address, or to cause a DoS...

dnsmasq -- multiple vulnerabilities

Simon Kelley reports: Today, 11th May 2026 CERT is releasing a set of six CVEs for serious security vulnerabilities in dnsmasq. These are all long-standing bugs which apply to pretty much all non-ancient versions. Christopher Cullen and Molly Jaconski write, in Vulnerability Note VU471747:...

CVE-2025-12970

The extractname function in Fluent Bit indocker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary...

Linux Distros Unpatched Vulnerability : CVE-2021-45953

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Dnsmasq 2.86 has a heap-based buffer overflow in extractname called from hashquestions and fuzzutil.c. NOTE: the vendor's position is that CVE-2021-45951 throug...

dnsmasq security update

2.76-17.0.3.3 - Fixed heap-based buffer overflow in sortrrset CVE-2020-25681 Orabug: 35904921 - Fixed buffer overflow in extractname CVE-2020-25682 Orabug: 35904921...

Dnsmasq extract_name function Heap Buffer Overflow DoS

The vulnerability of the extractname function in the fuzzutil.c component of the DNS server Dnsmasq is related to writing beyond the buffer boundaries. Exploiting this vulnerability can allow a remote attacker to access confidential data, compromise its integrity, and cause service failures...

Dnsmasq extract_name function Data Compromise

The vulnerability of the extractname function in the Dnsmasq DNS server is related to buffer overflow attacks. Exploiting this vulnerability can allow a remote attacker to access sensitive data, compromise its integrity, and cause service interruptions...

SUSE CVE-2021-45954

Dnsmasq 2.86 has a heap-based buffer overflow in extractname called from answerauth and FuzzAuth. NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge...

dnsmasq:fuzz_rfc1035: Heap-buffer-overflow in extract_name

Detailed Report: https://oss-fuzz.com/testcase?key=4864497194500096 Project: dnsmasq Fuzzing Engine: afl Fuzz Target: fuzzrfc1035 Job Type: aflasandnsmasq Platform Id: linux Crash Type: Heap-buffer-overflow WRITE 1 Crash Address: 0x60d002900d6c Crash State: extractname checkbadaddress...

Dnsmasq 2.86 has a heap-based buffer overflow in extract_name (called from answer_auth and FuzzAuth). NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities to the best of our knowledge.

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CVE-2021-45954

Dnsmasq 2.86 has a heap-based buffer overflow in extractname called from answerauth and FuzzAuth. NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge...

OSV-2022-6 Heap-buffer-overflow in extract_name

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=43299 Crash type: Heap-buffer-overflow WRITE 1 Crash state: extractname hashquestions fuzzutil.c...

dnsmasq:fuzz_util: Heap-buffer-overflow in extract_name

Detailed Report: https://oss-fuzz.com/testcase?key=4599588072325120 Project: dnsmasq Fuzzing Engine: libFuzzer Fuzz Target: fuzzutil Job Type: libfuzzerasandnsmasq Platform Id: linux Crash Type: Heap-buffer-overflow WRITE 1 Crash Address: 0x607000000e6c Crash State: extractname hashquestions...

CVE-2021-45953

Dnsmasq 2.86 has a heap-based buffer overflow in extractname called from hashquestions and fuzzutil.c. NOTE: the vendor's position is that CVE-2021-45951 through CVE-2021-45957 "do not represent real vulnerabilities, to the best of our knowledge...