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 container images, was found vulnerable to several security issues stemming from underlying Go libraries. These include CVE-2025-47913 (SSH client panic due to unexpected SSH_AGENT_SUCCESS in golang.org/x/crypto/ssh/agent), CVE-2025-61729 (denial of service via crafted certificate in crypto/x509), CVE-2025-61726 (memory exhaustion in query parameter parsing in net/url), CVE-2025-68121 (unexpected TLS session resumption in crypto/tls), and CVE-2026-25679 (incorrect parsing of IPv6 host literals in net/url). Red Hat issued an important security advisory (RHSA-2026:12030) providing updates for buildah in Red Hat Enterprise Linux 9.4 Extended Update Support to remediate these vulnerabilities.
Potential Impact
The vulnerabilities could lead to denial of service conditions (via resource exhaustion or panic) and potential security issues related to TLS session resumption and URL parsing. These issues affect the reliability and security of container image building processes using buildah, potentially impacting systems that build or manage OCI and Docker images.
Mitigation Recommendations
Red Hat has released updated buildah packages addressing these vulnerabilities. Users of Red Hat Enterprise Linux 9.4 Extended Update Support should apply the security update RHSA-2026:12030 promptly to remediate these issues. For detailed update instructions, refer to Red Hat's official advisory and update documentation. No additional mitigation steps are indicated beyond applying the vendor-provided 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 container images, was found vulnerable to several security issues stemming from underlying Go libraries. These include CVE-2025-47913 (SSH client panic due to unexpected SSH_AGENT_SUCCESS in golang.org/x/crypto/ssh/agent), CVE-2025-61729 (denial of service via crafted certificate in crypto/x509), CVE-2025-61726 (memory exhaustion in query parameter parsing in net/url), CVE-2025-68121 (unexpected TLS session resumption in crypto/tls), and CVE-2026-25679 (incorrect parsing of IPv6 host literals in net/url). Red Hat issued an important security advisory (RHSA-2026:12030) providing updates for buildah in Red Hat Enterprise Linux 9.4 Extended Update Support to remediate these vulnerabilities.
Potential Impact
The vulnerabilities could lead to denial of service conditions (via resource exhaustion or panic) and potential security issues related to TLS session resumption and URL parsing. These issues affect the reliability and security of container image building processes using buildah, potentially impacting systems that build or manage OCI and Docker images.
Mitigation Recommendations
Red Hat has released updated buildah packages addressing these vulnerabilities. Users of Red Hat Enterprise Linux 9.4 Extended Update Support should apply the security update RHSA-2026:12030 promptly to remediate these issues. For detailed update instructions, refer to Red Hat's official advisory and update documentation. No additional mitigation steps are indicated beyond applying the vendor-provided 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"]
- State
- PUBLISHED
Threat ID: 6a160965e29bf47b5062a4c3
Added to database: 05/26/2026, 20:58:13 UTC
Last enriched: 08/14/2026, 19:55:44 UTC
Last updated: 09/14/2026, 00:36:29 UTC
Views: 84
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