CVE-2026-3104

high

Description

A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.

References

https://kb.isc.org/docs/cve-2026-3104

https://www.securityweek.com/bind-updates-patch-high-severity-vulnerabilities-2/

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3104.json

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-15410

https://downloads.isc.org/isc/bind9/9.21.20

https://downloads.isc.org/isc/bind9/9.20.21

https://bugzilla.redhat.com/show_bug.cgi?id=2451310

https://access.redhat.com/security/cve/CVE-2026-3104

https://access.redhat.com/errata/RHSA-2026:6935

Details

Source: Mitre, NVD

Published: 2026-03-25

Updated: 2026-09-01

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

EPSS

EPSS: 0.00028