CVE-2026-3104

7.5 highEPSS 0.7%

High (7.5) in isc bind. EPSS 0.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWEs: CWE-401, CWE-772
Published: 2026-03-25
Modified: 2026-09-01
Record from: the NVD, synced 2026-10-19

Affected

isc:bind

References

https://downloads.isc.org/isc/bind9/9.20.21
https://downloads.isc.org/isc/bind9/9.21.20
https://kb.isc.org/docs/cve-2026-3104
https://access.redhat.com/errata/RHSA-2026:6935
https://access.redhat.com/security/cve/CVE-2026-3104

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