CVE-2026-4892

HIGH 8.4

CVE-2026-4892

CVSS Score

8.4

EPSS Score

0.0%

EPSS Percentile

0th

A heap-based out-of-bounds write vulnerability in the DHCPv6 implementation of dnsmasq allows local attackers to execute arbitrary code with root privileges via a crafted DHCPv6 packet.

Vendor	dnsmasq
Product	dnsmasq
Published	May 11, 2026
Last Updated	Jul 15, 2026

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Affected Versions

dnsmasq / dnsmasq

0 < 2.92rel2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

lists.thekelleys.org.uk: https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html kb.cert.org: https://www.kb.cert.org/vuls/id/471747 thekelleys.org.uk: https://thekelleys.org.uk/dnsmasq/CVE/ github.com: https://github.com/NixOS/nixpkgs/pull/519082 github.com: https://github.com/NixOS/nixpkgs/pull/519093 github.com: https://github.com/pi-hole/FTL/releases/tag/v6.6.2 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-4892 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2458518 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4892.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19158 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:20589 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:34508 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19373