CVE-2026-3104
Memory leak in code preparing DNSSEC proofs of non-existence
- State
- Published
- Severity
- 7.5 High
- Published
- Mar 25, 2026
- Updated
- Sep 1, 2026
- Reserved
- Feb 24, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | isc |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
Weaknesses
- CWE-772 Missing Release of Resource after Effective Lifetime
Affected Products
| Product | Versions |
|---|---|
BIND 9ISC |
|
References
- CVE-2026-3104vendor-advisory
- https://downloads.isc.org/isc/bind9/9.20.21patch
- https://downloads.isc.org/isc/bind9/9.21.20patch
- https://access.redhat.com/security/cve/CVE-2026-3104vdb-entry
- RHBZ#2451310issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3104.json
- https://access.redhat.com/errata/RHSA-2026:6935vendor-advisory
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