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CVE-2026-4892

38
FAUCET Score

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.

First published: May 11, 2026Last modified: May 20, 2026

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, < 2.92rel2CPE match
cpe:2.3:a:dnsmasq:dnsmasq:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.4HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.5
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.81%
Probability of exploitation in next 30 days
EPSS Percentile
53.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0081 is in the 62nd percentile among its peer group of 1,859 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

microsoft2026-May/CVE-2026-4892Important

CVE-2026-4892

May 12, 2026

References

access.redhat.com / errata/RHSA-2026:19158
access.redhat.com / errata/RHSA-2026:19373
access.redhat.com / errata/RHSA-2026:20589
access.redhat.com / errata/RHSA-2026:34508
access.redhat.com / errata/RHSA-2026:40762
access.redhat.com / security/cve/CVE-2026-4892
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-4892.json
github.com / NixOS/nixpkgs/pull/519082
github.com / NixOS/nixpkgs/pull/519093
github.com / pi-hole/FTL/releases/tag/v6.6.2
lists.thekelleys.org.uk / pipermail/dnsmasq-discuss/2026q2/018471.html
thekelleys.org.uk / dnsmasq/CVE
kb.cert.org / vuls/id/471747