Medium [CVE-2026-19668] Denial of Service via invalid DNSSEC records
This medium-severity Red Hat Linux advisory covers CVE-2026-19668; related products: Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7.
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Summary
Denial of Service via invalid DNSSEC records. Red Hat rates this moderate (CVSS 5.3).
Weakness: CWE-770. Red Hat lists fixing advisory RHSA-2026:68279 with package bind-main-9.20.29-0.1.hum1.
Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; and 4 more.
Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4; Red Hat package: bind9.16; Red Hat package: bind9.18.
- 9.11.0
- 9.18.50
- 9.20.0
- 9.20.27
- 9.21.0
- 9.21.25
- 9.11.3
- 9.20.9
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
- bind-main-9.20.29-0.1.hum1
- RHSA-2026:68279
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
Mitigation checklist
- To mitigate potential denial of service, ensure that the BIND recursive resolver's configuration includes appropriate limits for `max-records-per-type` and `max-types-per-name` within the `named.conf` file. These settings help control resource consumption when encountering invalid DNSSEC records. A restart of the `named` service is required for any configuration changes to take effect.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
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