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) * crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283) 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 Red Hat security advisory RHSA-2026:16102 addresses six vulnerabilities in the buildah package, which facilitates building OCI container images. The fixed issues 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), CVE-2026-25679 (Incorrect parsing of IPv6 host literals in net/url), and CVE-2026-32283 (Denial of Service via multiple TLS 1.3 key update messages in crypto/tls). These vulnerabilities affect the buildah package version 1:1.26.11-1.el9_0 in Red Hat Enterprise Linux 9.0 across multiple architectures. The advisory includes links to updated packages and instructions for applying the fixes.
Potential Impact
The vulnerabilities collectively can cause denial of service conditions, memory exhaustion, unexpected client panics, and incorrect protocol handling in applications using the affected buildah package and underlying Go libraries. These issues may disrupt container image building processes or related network communications. The severity is rated as high by Red Hat Product Security. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated buildah packages for Red Hat Enterprise Linux 9.0 that address these vulnerabilities. Users should apply the provided security update as described in the Red Hat advisory RHSA-2026:16102 and the referenced article https://access.redhat.com/articles/11258. No additional mitigations 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) * crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283) 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 Red Hat security advisory RHSA-2026:16102 addresses six vulnerabilities in the buildah package, which facilitates building OCI container images. The fixed issues 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), CVE-2026-25679 (Incorrect parsing of IPv6 host literals in net/url), and CVE-2026-32283 (Denial of Service via multiple TLS 1.3 key update messages in crypto/tls). These vulnerabilities affect the buildah package version 1:1.26.11-1.el9_0 in Red Hat Enterprise Linux 9.0 across multiple architectures. The advisory includes links to updated packages and instructions for applying the fixes.
Potential Impact
The vulnerabilities collectively can cause denial of service conditions, memory exhaustion, unexpected client panics, and incorrect protocol handling in applications using the affected buildah package and underlying Go libraries. These issues may disrupt container image building processes or related network communications. The severity is rated as high by Red Hat Product Security. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated buildah packages for Red Hat Enterprise Linux 9.0 that address these vulnerabilities. Users should apply the provided security update as described in the Red Hat advisory RHSA-2026:16102 and the referenced article https://access.redhat.com/articles/11258. No additional mitigations 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-2026:16102
- Cve Count
- 6
- Additional Cves
- ["CVE-2025-61726","CVE-2025-61729","CVE-2025-68121","CVE-2026-25679","CVE-2026-32283"]
- State
- PUBLISHED
Threat ID: 6a16096ce29bf47b50632ce4
Added to database: 05/26/2026, 20:58:20 UTC
Last enriched: 08/14/2026, 19:53:40 UTC
Last updated: 09/15/2026, 01:45:44 UTC
Views: 122
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