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dnsmasq: DHCPv6 CLID buffer overflow in helper process

🗓️ 19 May 2026 21:55:17Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 16 Views

dnsmasq DHCPv6 CLID helper overflows a fixed buffer by unvalidated CLID data, risking root privileges.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.8aarch64dnsmasq2.85-18.el9_8.1dnsmasq-2.85-18.el9_8.1.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lednsmasq2.85-18.el9_8.1dnsmasq-2.85-18.el9_8.1.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xdnsmasq2.85-18.el9_8.1dnsmasq-2.85-18.el9_8.1.s390x.rpm
Red Hat Enterprise Linux9.8x86_64dnsmasq2.85-18.el9_8.1dnsmasq-2.85-18.el9_8.1.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64dnsmasq-debuginfo2.85-18.el9_8.1dnsmasq-debuginfo-2.85-18.el9_8.1.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lednsmasq-debuginfo2.85-18.el9_8.1dnsmasq-debuginfo-2.85-18.el9_8.1.ppc64le.rpm
Red Hat Enterprise Linux9.8s390xdnsmasq-debuginfo2.85-18.el9_8.1dnsmasq-debuginfo-2.85-18.el9_8.1.s390x.rpm
Red Hat Enterprise Linux9.8x86_64dnsmasq-debuginfo2.85-18.el9_8.1dnsmasq-debuginfo-2.85-18.el9_8.1.x86_64.rpm
Red Hat Enterprise Linux9.8aarch64dnsmasq-debugsource2.85-18.el9_8.1dnsmasq-debugsource-2.85-18.el9_8.1.aarch64.rpm
Red Hat Enterprise Linux9.8ppc64lednsmasq-debugsource2.85-18.el9_8.1dnsmasq-debugsource-2.85-18.el9_8.1.ppc64le.rpm
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21 Aug 2026 12:44Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.18.8
EPSS0.00812
SSVC
16