CVE-2026-4892CWE-122

CVE-2026-4892

High · published May 11, 2026

CVSS v3.1
8.4
EPSS
0%
Percentile
22.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.4 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00306 · 22.2th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-05-11T22:16Z
References (14)
https://github.com/NixOS/nixpkgs/pull/519082 · [email protected]https://github.com/NixOS/nixpkgs/pull/519093 · [email protected]https://github.com/pi-hole/FTL/releases/tag/v6.6.2 · [email protected]https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html · [email protected]https://thekelleys.org.uk/dnsmasq/CVE/ · [email protected]https://www.kb.cert.org/vuls/id/471747 · [email protected]https://access.redhat.com/errata/RHSA-2026:19158 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:19373 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:20589 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:34508 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/errata/RHSA-2026:40762 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-4892 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2458518 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4892.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
EPSS history
Timeline
  • 11 MAY 16:47Z
    CVE-2026-4892
    cvelistv5