CVE-2026-3104
7.5
HIGH
CVSS 3.1
EPSS 0.05%
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.
How to fix CVE-2026-3104
To remediate CVE-2026-3104, upgrade the affected package to a fixed version below.
- Alpine/bind—upgrade to 9.20.21-r0 or later
- —upgrade to 1:9.20.21-1~deb13u1 or later
Is CVE-2026-3104 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 9.20.21-r0
- from 0, < 1:9.20.21-1~deb13u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |