Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isc | Bind | >= 9.20.0, < 9.20.21 |
Related Weaknesses (CWE)
References
- https://downloads.isc.org/isc/bind9/9.20.21Patch
- https://downloads.isc.org/isc/bind9/9.21.20Patch
- https://kb.isc.org/docs/cve-2026-3104Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:6935
- https://access.redhat.com/security/cve/CVE-2026-3104
- https://bugzilla.redhat.com/show_bug.cgi?id=2451310
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3104.json
FAQ
What is CVE-2026-3104?
CVE-2026-3104 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ...
How severe is CVE-2026-3104?
CVE-2026-3104 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-3104?
Check the references section above for vendor advisories and patch information. Affected products include: Isc Bind.