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, has multiple security flaws fixed in Red Hat Enterprise Linux 9.6 Extended Update Support. The vulnerabilities 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 from excessive resource consumption via crafted certificates in crypto/x509), CVE-2025-61726 (memory exhaustion in query parameter parsing in net/url), CVE-2025-68121 (incorrect certificate validation during TLS session resumption in crypto/tls), and CVE-2026-25679 (incorrect parsing of IPv6 host literals in net/url). These issues could lead to denial of service or unexpected behavior in applications using buildah. Red Hat has released updated buildah packages to address these vulnerabilities.
Potential Impact
The vulnerabilities collectively can cause denial of service conditions through resource exhaustion or unexpected application panics, and may lead to incorrect TLS session resumption behavior or improper parsing of network addresses. These impacts affect the security and stability of container image building processes using buildah on affected Red Hat Enterprise Linux 9.6 systems.
Mitigation Recommendations
Red Hat has released updated buildah packages (version 1.39.6-2.el9_6) that fix these vulnerabilities. Users should apply the official security update available from Red Hat for Red Hat Enterprise Linux 9.6 Extended Update Support. Refer to the Red Hat advisory RHSA-2026:11749 and the update article https://access.redhat.com/articles/11258 for detailed instructions. No additional mitigations are required beyond applying the official patch.
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, has multiple security flaws fixed in Red Hat Enterprise Linux 9.6 Extended Update Support. The vulnerabilities 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 from excessive resource consumption via crafted certificates in crypto/x509), CVE-2025-61726 (memory exhaustion in query parameter parsing in net/url), CVE-2025-68121 (incorrect certificate validation during TLS session resumption in crypto/tls), and CVE-2026-25679 (incorrect parsing of IPv6 host literals in net/url). These issues could lead to denial of service or unexpected behavior in applications using buildah. Red Hat has released updated buildah packages to address these vulnerabilities.
Potential Impact
The vulnerabilities collectively can cause denial of service conditions through resource exhaustion or unexpected application panics, and may lead to incorrect TLS session resumption behavior or improper parsing of network addresses. These impacts affect the security and stability of container image building processes using buildah on affected Red Hat Enterprise Linux 9.6 systems.
Mitigation Recommendations
Red Hat has released updated buildah packages (version 1.39.6-2.el9_6) that fix these vulnerabilities. Users should apply the official security update available from Red Hat for Red Hat Enterprise Linux 9.6 Extended Update Support. Refer to the Red Hat advisory RHSA-2026:11749 and the update article https://access.redhat.com/articles/11258 for detailed instructions. No additional mitigations are required 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-2026:11749
- Cve Count
- 5
- Additional Cves
- ["CVE-2025-61726","CVE-2025-61729","CVE-2025-68121","CVE-2026-25679"]
- State
- PUBLISHED
Threat ID: 6a160965e29bf47b5062a4d3
Added to database: 05/26/2026, 20:58:13 UTC
Last enriched: 08/14/2026, 19:56:14 UTC
Last updated: 09/13/2026, 10:01:27 UTC
Views: 84
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