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 10 Release Notes linked from the References section.
AI Analysis
Technical Summary
The unbound DNS resolver in Red Hat Enterprise Linux 10 is affected by two security vulnerabilities: CVE-2024-33655, known as DNSBomb, and CVE-2025-11411, which involves domain hijacking via promiscuous records. Red Hat has released an updated unbound package (version 1.24.2-7.el10) that addresses these vulnerabilities. The advisory covers multiple Red Hat Enterprise Linux 10 variants and related CodeReady Linux Builder products across various architectures. No CVSS score is provided in the advisory, but the impact is rated as moderate. The update also disables TLS 1.2 by default and includes other maintenance changes.
Potential Impact
These vulnerabilities could allow an attacker to exploit the DNS resolver to cause denial of service (DNSBomb) or hijack domain resolution via promiscuous record handling. The advisory classifies the impact as moderate, indicating a security risk that could affect DNS resolution integrity and availability. There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released an official security update for unbound (version 1.24.2-7.el10) that fixes the identified vulnerabilities. Users of affected Red Hat Enterprise Linux 10 products and related CodeReady Linux Builder variants should apply this update promptly. Detailed update instructions are available in the Red Hat article https://access.redhat.com/articles/11258. 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 10 Release Notes linked from the References section.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The unbound DNS resolver in Red Hat Enterprise Linux 10 is affected by two security vulnerabilities: CVE-2024-33655, known as DNSBomb, and CVE-2025-11411, which involves domain hijacking via promiscuous records. Red Hat has released an updated unbound package (version 1.24.2-7.el10) that addresses these vulnerabilities. The advisory covers multiple Red Hat Enterprise Linux 10 variants and related CodeReady Linux Builder products across various architectures. No CVSS score is provided in the advisory, but the impact is rated as moderate. The update also disables TLS 1.2 by default and includes other maintenance changes.
Potential Impact
These vulnerabilities could allow an attacker to exploit the DNS resolver to cause denial of service (DNSBomb) or hijack domain resolution via promiscuous record handling. The advisory classifies the impact as moderate, indicating a security risk that could affect DNS resolution integrity and availability. There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released an official security update for unbound (version 1.24.2-7.el10) that fixes the identified vulnerabilities. Users of affected Red Hat Enterprise Linux 10 products and related CodeReady Linux Builder variants should apply this update promptly. Detailed update instructions are available in the Red Hat article https://access.redhat.com/articles/11258. 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-2026:18556
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-11411"]
- Cvss Version
- null
Threat ID: 6a3da1c64853345fc18204b8
Added to database: 06/25/2026, 21:46:46 UTC
Last enriched: 06/25/2026, 21:58:21 UTC
Last updated: 07/03/2026, 08:51:19 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.