Lucene search
+L
Catalog
Vendors
Products
Timeline
Vulnerabilities
Sources
Documentation
Blog
Glossary
FAQ
Brand assets
Assessment
Agents dashboard
Agent Scanning
API Scanning
Assessment API
Alerts
Email notifications
Webhook notifications
Alerts API
SBOM package analysis
Assessment
Vulnerability Intelligence
Exploits
Alerts
Datasets
MCP
White Label
Security Automation SDK
MCP for AI Agents
Plans & Pricing
API Reference
Settings
Sign in

dnsmasq: RRSIG rdlen underflow leading to heap OOB read

🗓️ 01 Jul 2026 21:21:55Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 29 Views

Dnsmasq DNSSEC validation RRSIG underflow causes heap out-of-bounds read and crash.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb		CVE-2026-4891
11 May 202616:47
–attackerkb
nessus
Tenable Nessus		Amazon Linux 2023 : dnsmasq, dnsmasq-utils (ALAS2023-2026-1729)
26 May 202600:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : dnsmasq, --advisory ALAS2DNSMASQ-2026-004 (ALASDNSMASQ-2026-004)
27 May 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 8 : dnsmasq (ALSA-2026:20589)
27 May 202600:00
–nessus
nessus
Tenable Nessus		CentOS Linux 7.9 [CIQ] Security Update: dnsmasq / dnsmasq-debuginfo / dnsmasq-utils Multiple Vulnerabilities (ciqsa-2026_1468)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus		Rocky Linux 10.2 [CIQ] Security Update: dnsmasq / dnsmasq-debuginfo / dnsmasq-debugsource / dnsmasq-utils / etc Multiple Vulnerabilities (crlsa-2026_19158)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus		Rocky Linux 8.6 [CIQ] Security Update: dnsmasq / dnsmasq-debuginfo / dnsmasq-debugsource / dnsmasq-utils / etc Multiple Vulnerabilities (ciqsa-2026_1467)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus		Rocky Linux 8 [CIQ] Security Update: dnsmasq / dnsmasq-debuginfo / dnsmasq-debugsource / dnsmasq-utils / etc Multiple Vulnerabilities (crlsa-2026_20589)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus		Rocky Linux 9.4 [CIQ] Security Update: dnsmasq / dnsmasq-debuginfo / dnsmasq-debugsource / dnsmasq-utils / etc Multiple Vulnerabilities (ciqsa-2026_1387)
1 Oct 202600:00
–nessus
nessus
Tenable Nessus		Rocky Linux 9.6 [CIQ] Security Update: dnsmasq / dnsmasq-debuginfo / dnsmasq-debugsource / dnsmasq-utils / etc Multiple Vulnerabilities (ciqsa-2026_1352)
1 Oct 202600:00
–nessus
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.6aarch64dnsmasq2.85-17.el9_6.1dnsmasq-2.85-17.el9_6.1.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lednsmasq2.85-17.el9_6.1dnsmasq-2.85-17.el9_6.1.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xdnsmasq2.85-17.el9_6.1dnsmasq-2.85-17.el9_6.1.s390x.rpm
Red Hat Enterprise Linux9.6x86_64dnsmasq2.85-17.el9_6.1dnsmasq-2.85-17.el9_6.1.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64dnsmasq-debuginfo2.85-17.el9_6.1dnsmasq-debuginfo-2.85-17.el9_6.1.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lednsmasq-debuginfo2.85-17.el9_6.1dnsmasq-debuginfo-2.85-17.el9_6.1.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xdnsmasq-debuginfo2.85-17.el9_6.1dnsmasq-debuginfo-2.85-17.el9_6.1.s390x.rpm
Red Hat Enterprise Linux9.6x86_64dnsmasq-debuginfo2.85-17.el9_6.1dnsmasq-debuginfo-2.85-17.el9_6.1.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64dnsmasq-debugsource2.85-17.el9_6.1dnsmasq-debugsource-2.85-17.el9_6.1.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lednsmasq-debugsource2.85-17.el9_6.1dnsmasq-debugsource-2.85-17.el9_6.1.ppc64le.rpm
Rows per page

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

Book a live demo
02 Oct 2026 17:31Current
7.3High risk
Vulners AI Score7.3
CVSS 3.17.5
EPSS0.00836
SSVC
CWE-125
DnsmasqResource Record signatureUnderflowHeap read crash
29