Red Hat Security Advisory: bind security update
Two security vulnerabilities affecting the Berkeley Internet Name Domain (BIND) implementation in Red Hat Enterprise Linux 9. 4 Extended Update Support have been addressed. These vulnerabilities involve cache poisoning attacks: one through unsolicited resource records (CVE-2025-40778) and another due to a weak pseudo-random number generator (CVE-2025-40780). Red Hat has released updated packages to fix these issues. The advisory rates the security impact as Important (high severity). No known exploits are reported in the wild at this time.
AI Analysis
Technical Summary
The vulnerabilities affect BIND, a DNS protocol implementation including a DNS server and resolver library, used in Red Hat Enterprise Linux 9.4 EUS and related products. CVE-2025-40778 allows cache poisoning via unsolicited resource records, while CVE-2025-40780 involves cache poisoning due to a weak pseudo-random number generator. These issues could allow an attacker to manipulate DNS cache entries. Red Hat has issued security updates to address these flaws, with updated bind packages available for multiple architectures including x86_64 and s390x. The advisory is classified as Important by Red Hat Product Security.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to perform DNS cache poisoning, potentially redirecting DNS queries to malicious destinations. This could impact the integrity and reliability of DNS resolution on affected systems. No exploits are currently known to be active in the wild. The severity is rated as high by the source data, indicating significant risk if unpatched.
Mitigation Recommendations
Red Hat has released updated bind packages that fix these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.4 Extended Update Support and related products should apply the provided security updates promptly. Detailed update instructions are available in the Red Hat advisory (RHSA-2025:21817) and associated knowledge base article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor advisory beyond applying the official patches.
Red Hat Security Advisory: bind security update
Description
Two security vulnerabilities affecting the Berkeley Internet Name Domain (BIND) implementation in Red Hat Enterprise Linux 9. 4 Extended Update Support have been addressed. These vulnerabilities involve cache poisoning attacks: one through unsolicited resource records (CVE-2025-40778) and another due to a weak pseudo-random number generator (CVE-2025-40780). Red Hat has released updated packages to fix these issues. The advisory rates the security impact as Important (high severity). No known exploits are reported in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerabilities affect BIND, a DNS protocol implementation including a DNS server and resolver library, used in Red Hat Enterprise Linux 9.4 EUS and related products. CVE-2025-40778 allows cache poisoning via unsolicited resource records, while CVE-2025-40780 involves cache poisoning due to a weak pseudo-random number generator. These issues could allow an attacker to manipulate DNS cache entries. Red Hat has issued security updates to address these flaws, with updated bind packages available for multiple architectures including x86_64 and s390x. The advisory is classified as Important by Red Hat Product Security.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to perform DNS cache poisoning, potentially redirecting DNS queries to malicious destinations. This could impact the integrity and reliability of DNS resolution on affected systems. No exploits are currently known to be active in the wild. The severity is rated as high by the source data, indicating significant risk if unpatched.
Mitigation Recommendations
Red Hat has released updated bind packages that fix these vulnerabilities. Users of affected Red Hat Enterprise Linux 9.4 Extended Update Support and related products should apply the provided security updates promptly. Detailed update instructions are available in the Red Hat advisory (RHSA-2025:21817) and associated knowledge base article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor advisory beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:21817
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-40780"]
- Cvss Version
- null
Threat ID: 6a1f4e86e29bf47b5007fc0c
Added to database: 6/2/2026, 9:43:34 PM
Last enriched: 6/2/2026, 10:02:16 PM
Last updated: 6/3/2026, 5:03:40 AM
Views: 2
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