Medium [CVE-2026-19662] Denial of Service via crafted DNSSEC responses
This medium-severity Red Hat Linux advisory covers CVE-2026-19662; 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 crafted DNSSEC responses. Red Hat rates this moderate (CVSS 5.9).
Weakness: CWE-825. 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
- 9.11.3
- 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 this issue, consider disabling DNSSEC validation on `named` resolvers if it is not a strict requirement for your environment. This can be achieved by setting `dnssec-validation no;` in the `named.conf` file. Disabling DNSSEC validation will prevent the resolver from processing DNSSEC-signed zones, thereby avoiding this specific vulnerability, but it will also remove the security benefits provided by DNSSEC. After modifying the configuration, the `named` service must be reloaded or restarted for the changes to take effect. `sudo systemctl reload named` `sudo systemctl restart named`
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
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