CVE-2026-4892

HIGH

8.4

CVSS Score

Published: May 11, 2026 at 04:47 PM UTC

Updated: September 1, 2026 at 12:28 PM UTC

2 products affected across 2 vendorsEnterprise LinuxDnsmasq

Using dnsmasq by dnsmasq?

Get instant alerts when new vulnerabilities affect dnsmasq - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH8.4

Exploit prediction

EPSS 0.8%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Dnsmasq · Dnsmasq

60%

v < 2.92rel2

Affected range stops below 2.92rel2, so it looks safe — our inference, not a vendor statement

Enterprise Linux · Red Hatrpm

60%

Vendor states this is fixed in 0:2.79-36.el8_10 (unaffected)

Vendor states this is fixed in 0:2.85-17.el9_6.1 (unaffected)

Vendor states this is fixed in 0:2.85-18.el9_8.1 (unaffected)

Vendor states this is fixed in 0:2.90-7.el10_2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (15)

Source: cverecord

https://thekelleys.org.uk/dnsmasq/

Source: cverecord

https://www.kb.cert.org/vuls/id/471747

Source: cverecord

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html

Source: cverecord

https://thekelleys.org.uk/dnsmasq/CVE/

Source: cverecord

https://github.com/NixOS/nixpkgs/pull/519082

Source: cverecord

https://github.com/NixOS/nixpkgs/pull/519093

Source: cverecord

https://github.com/pi-hole/FTL/releases/tag/v6.6.2

Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

https://access.redhat.com/errata/RHSA-2026:19158

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.4HIGHCISA-ADP

Attack Vector: LOCAL
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-122

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card