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): * github.com/go-jose/go-jose/v3: github.com/go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object (CVE-2026-34986) * crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283) * crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280) 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, a tool for building OCI container images, is affected by three denial of service vulnerabilities originating from Go libraries it depends on: CVE-2026-34986 (Go JOSE: crafted JSON Web Encryption object), CVE-2026-32283 (Go crypto/tls: multiple TLS 1.3 key update messages), and CVE-2026-32280 (Go crypto/x509: certificate chain building). These vulnerabilities can cause denial of service conditions when processing maliciously crafted inputs. Red Hat has released updated buildah packages for Red Hat Enterprise Linux 9.6 Extended Update Support to address these issues.
Potential Impact
Successful exploitation of these vulnerabilities could result in denial of service conditions in buildah when processing certain malformed JSON Web Encryption objects, TLS 1.3 key update messages, or certificate chains. This could disrupt container image building operations but does not indicate remote code execution or data disclosure. The advisory classifies the security impact as Important.
Mitigation Recommendations
Red Hat has released updated buildah packages for Red Hat Enterprise Linux 9.6 Extended Update Support that address these vulnerabilities. Users should apply the provided security update (buildah-1.39.9-1.el9_6) as detailed in the Red Hat advisory RHSA-2026:20607 and the referenced article https://access.redhat.com/articles/11258. No additional mitigations are specified or required 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): * github.com/go-jose/go-jose/v3: github.com/go-jose/go-jose/v4: Go JOSE: Denial of Service via crafted JSON Web Encryption (JWE) object (CVE-2026-34986) * crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283) * crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280) 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
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The buildah package, a tool for building OCI container images, is affected by three denial of service vulnerabilities originating from Go libraries it depends on: CVE-2026-34986 (Go JOSE: crafted JSON Web Encryption object), CVE-2026-32283 (Go crypto/tls: multiple TLS 1.3 key update messages), and CVE-2026-32280 (Go crypto/x509: certificate chain building). These vulnerabilities can cause denial of service conditions when processing maliciously crafted inputs. Red Hat has released updated buildah packages for Red Hat Enterprise Linux 9.6 Extended Update Support to address these issues.
Potential Impact
Successful exploitation of these vulnerabilities could result in denial of service conditions in buildah when processing certain malformed JSON Web Encryption objects, TLS 1.3 key update messages, or certificate chains. This could disrupt container image building operations but does not indicate remote code execution or data disclosure. The advisory classifies the security impact as Important.
Mitigation Recommendations
Red Hat has released updated buildah packages for Red Hat Enterprise Linux 9.6 Extended Update Support that address these vulnerabilities. Users should apply the provided security update (buildah-1.39.9-1.el9_6) as detailed in the Red Hat advisory RHSA-2026:20607 and the referenced article https://access.redhat.com/articles/11258. No additional mitigations are specified or required 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-2026:20607
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-32283","CVE-2026-34986"]
- Cvss Version
- null
Threat ID: 6a16095ae29bf47b50622839
Added to database: 05/26/2026, 20:58:02 UTC
Last enriched: 07/30/2026, 08:54:54 UTC
Last updated: 07/31/2026, 21:28:44 UTC
Views: 68
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