high7.5
CVE-2026-3104
A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Isc | Bind | from 9.20.0 before 9.20.21 from 9.21.0 before 9.21.20 |
Weakness classification
References
- NVD record
- CVE.org record
- 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
- https://bugzilla.redhat.com/show_bug.cgi?id=2451310
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3104.json