CVE-2026-4892

CVE-2026-4892

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

dnsmasq

CVSS v3.1 CNA

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

CVSS v3.1 CNA

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

EPSS

0.31% chance of exploitation in the next 30 days, 22nd percentile

Published

2026-05-11

Updated

2026-08-25

Proof-of-concept exploits (1)

• xchglabs/dnsmasq_2.92_pocs6★ · 2026-05-12

Security advisories

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

References

• CVE Record
• NVD entry

Related

• CVE-2026-2291