Red Hat Security Advisory: bind security update
Description
Multiple denial of service vulnerabilities have been identified in the Berkeley Internet Name Domain (BIND) software used in Red Hat Enterprise Linux 9. These include issues with DNS negative cache handling, crafted DNSSEC replies, and malformed DNS64 responses. Red Hat has released security updates to address these vulnerabilities.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The BIND DNS implementation in Red Hat Enterprise Linux 9 contains three denial of service vulnerabilities: CVE-2026-19667 involves a 16-bit length truncation in DNS negative cache handling; CVE-2026-80274 involves denial of service via crafted DNSSEC replies; and CVE-2026-19666 involves denial of service via malformed DNS64 responses. These issues could cause the DNS server to become unavailable or crash. Red Hat has issued security advisories and updates to fix these vulnerabilities.
Potential Impact
Successful exploitation of these vulnerabilities could result in denial of service conditions affecting DNS resolution services on affected Red Hat Enterprise Linux 9 systems. This could disrupt network operations dependent on DNS but does not indicate code execution or data disclosure.
Mitigation Recommendations
Red Hat has released security updates for BIND in Red Hat Enterprise Linux 9 to address these vulnerabilities. Users should apply the provided updates as detailed in the Red Hat advisory RHSA-2026:75767. For update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigations are specified by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:75767
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-19667","CVE-2026-80274"]
- State
- PUBLISHED
Threat ID: 6ac415bb2cdf04f6563b4f94
Added to database: 10/05/2026, 21:25:15 UTC
Last enriched: 10/05/2026, 21:28:44 UTC
Last updated: 10/05/2026, 21:48:16 UTC
Views: 2
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