Red Hat Security Advisory: unbound security update
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fix(es): * unbound: DNSBomb vulnerability (CVE-2024-33655) * unbound: Unbound domain hijacking via promiscuous records (CVE-2025-11411) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes linked from the References section.
AI Analysis
Technical Summary
The unbound DNS resolver in Red Hat Enterprise Linux 9 contains two security vulnerabilities: CVE-2024-33655, known as DNSBomb, and CVE-2025-11411, which involves domain hijacking through promiscuous records. These issues could impact the DNS resolution process. Red Hat has released an updated unbound package (version 1.24.2-2.el9) that addresses these vulnerabilities. The advisory covers multiple Red Hat Enterprise Linux 9 variants and architectures. No CVSS scores are provided in the advisory, but the severity is rated as moderate by Red Hat Product Security.
Potential Impact
The vulnerabilities affect the unbound DNS resolver's ability to securely and correctly resolve DNS queries. The DNSBomb vulnerability (CVE-2024-33655) relates to resource exhaustion or denial of service, while CVE-2025-11411 involves potential domain hijacking via promiscuous DNS records. These could lead to DNS resolution failures or redirection to malicious domains, impacting system and network security where unbound is used. The advisory does not report known exploits in the wild.
Mitigation Recommendations
Red Hat has released an official security update for unbound in Red Hat Enterprise Linux 9 that fixes these vulnerabilities. Users should apply the update as per Red Hat's guidance available at https://access.redhat.com/articles/11258. The update includes the fixed unbound packages version 1.24.2-2.el9 and related components. No additional mitigation steps are indicated beyond applying the official patch.
Red Hat Security Advisory: unbound security update
Description
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. Security Fix(es): * unbound: DNSBomb vulnerability (CVE-2024-33655) * unbound: Unbound domain hijacking via promiscuous records (CVE-2025-11411) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 9 Release Notes linked from the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The unbound DNS resolver in Red Hat Enterprise Linux 9 contains two security vulnerabilities: CVE-2024-33655, known as DNSBomb, and CVE-2025-11411, which involves domain hijacking through promiscuous records. These issues could impact the DNS resolution process. Red Hat has released an updated unbound package (version 1.24.2-2.el9) that addresses these vulnerabilities. The advisory covers multiple Red Hat Enterprise Linux 9 variants and architectures. No CVSS scores are provided in the advisory, but the severity is rated as moderate by Red Hat Product Security.
Potential Impact
The vulnerabilities affect the unbound DNS resolver's ability to securely and correctly resolve DNS queries. The DNSBomb vulnerability (CVE-2024-33655) relates to resource exhaustion or denial of service, while CVE-2025-11411 involves potential domain hijacking via promiscuous DNS records. These could lead to DNS resolution failures or redirection to malicious domains, impacting system and network security where unbound is used. The advisory does not report known exploits in the wild.
Mitigation Recommendations
Red Hat has released an official security update for unbound in Red Hat Enterprise Linux 9 that fixes these vulnerabilities. Users should apply the update as per Red Hat's guidance available at https://access.redhat.com/articles/11258. The update includes the fixed unbound packages version 1.24.2-2.el9 and related components. No additional mitigation steps are indicated beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:18931
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-11411"]
- Cvss Version
- null
Threat ID: 6a3da1c64853345fc1820489
Added to database: 06/25/2026, 21:46:46 UTC
Last enriched: 06/25/2026, 21:57:48 UTC
Last updated: 07/02/2026, 20:51:13 UTC
Views: 5
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