Red Hat Security Advisory: buildah security update
The buildah package provides a tool for facilitating building OCI container images. Among other things, buildah enables you to: Create a working container, either from scratch or using an image as a starting point; Create an image, either from a working container or using the instructions in a Dockerfile; Build both Docker and OCI images. Security Fix(es): * golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: SSH client panic due to unexpected SSH_AGENT_SUCCESS (CVE-2025-47913) * crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729) * golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121) * net/url: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) 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.
AI Analysis
Technical Summary
The buildah package, used for building OCI and Docker container images, is affected by several security vulnerabilities originating from underlying Go libraries. These include CVE-2025-47913 (SSH client panic due to unexpected SSH_AGENT_SUCCESS), CVE-2025-61729 (denial of service via crafted certificate in crypto/x509), CVE-2025-61726 (memory exhaustion in net/url query parameter parsing), CVE-2025-68121 (incorrect certificate validation during TLS session resumption), and CVE-2026-25679 (incorrect parsing of IPv6 host literals in net/url). Red Hat has issued an important security update for buildah in Red Hat Enterprise Linux 9.4 Extended Update Support to address these issues.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial of service conditions (e.g., via resource exhaustion or client panic) and incorrect TLS session handling, potentially impacting the reliability and security of container image building processes. The issues affect cryptographic and URL parsing components used by buildah, which could disrupt normal operations or cause unexpected behavior.
Mitigation Recommendations
Red Hat has released an important security update for buildah in Red Hat Enterprise Linux 9.4 Extended Update Support that addresses these vulnerabilities. Users should apply the update as detailed in the Red Hat advisory (RHSA-2026:12030) available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: buildah security update
Description
The buildah package provides a tool for facilitating building OCI container images. Among other things, buildah enables you to: Create a working container, either from scratch or using an image as a starting point; Create an image, either from a working container or using the instructions in a Dockerfile; Build both Docker and OCI images. Security Fix(es): * golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: SSH client panic due to unexpected SSH_AGENT_SUCCESS (CVE-2025-47913) * crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729) * golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) * crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121) * net/url: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) 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.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The buildah package, used for building OCI and Docker container images, is affected by several security vulnerabilities originating from underlying Go libraries. These include CVE-2025-47913 (SSH client panic due to unexpected SSH_AGENT_SUCCESS), CVE-2025-61729 (denial of service via crafted certificate in crypto/x509), CVE-2025-61726 (memory exhaustion in net/url query parameter parsing), CVE-2025-68121 (incorrect certificate validation during TLS session resumption), and CVE-2026-25679 (incorrect parsing of IPv6 host literals in net/url). Red Hat has issued an important security update for buildah in Red Hat Enterprise Linux 9.4 Extended Update Support to address these issues.
Potential Impact
Successful exploitation of these vulnerabilities could lead to denial of service conditions (e.g., via resource exhaustion or client panic) and incorrect TLS session handling, potentially impacting the reliability and security of container image building processes. The issues affect cryptographic and URL parsing components used by buildah, which could disrupt normal operations or cause unexpected behavior.
Mitigation Recommendations
Red Hat has released an important security update for buildah in Red Hat Enterprise Linux 9.4 Extended Update Support that addresses these vulnerabilities. Users should apply the update as detailed in the Red Hat advisory (RHSA-2026:12030) available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:12030
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-61726","CVE-2025-61729","CVE-2025-68121","CVE-2026-25679"]
- Cvss Version
- null
Threat ID: 6a160965e29bf47b5062a4c3
Added to database: 05/26/2026, 20:58:13 UTC
Last enriched: 07/30/2026, 08:38:45 UTC
Last updated: 07/31/2026, 21:28:47 UTC
Views: 62
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