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): * runc: container escape and denial of service due to arbitrary write gadgets and procfs write redirects (CVE-2025-52881) * golang: archive/tar: Unbounded allocation when parsing GNU sparse map (CVE-2025-58183) * golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: SSH client panic due to unexpected SSH_AGENT_SUCCESS (CVE-2025-47913) * github.com/sirupsen/logrus: github.com/sirupsen/logrus: Denial-of-Service due to large single-line payload (CVE-2025-65637) 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-2026:4532 addresses four vulnerabilities affecting the buildah package on Red Hat Enterprise Linux 9.2. CVE-2025-52881 involves container escape and denial of service in runc due to arbitrary write gadgets and procfs write redirects. CVE-2025-58183 is an unbounded allocation vulnerability in golang's archive/tar when parsing GNU sparse maps. CVE-2025-47913 causes an SSH client panic in golang.org/x/crypto/ssh/agent due to unexpected SSH_AGENT_SUCCESS messages. CVE-2025-65637 is a denial-of-service vulnerability in github.com/sirupsen/logrus triggered by large single-line payloads. The advisory provides updated buildah packages that include fixes for these issues.
Potential Impact
Successful exploitation of these vulnerabilities could allow container escape, denial of service, unbounded memory allocation leading to resource exhaustion, and SSH client crashes. These impacts could compromise container isolation, cause service disruptions, and affect the stability of systems using the affected buildah versions.
Mitigation Recommendations
An updated buildah package version 1:1.29.5-1.el9_2.2 is available for Red Hat Enterprise Linux 9.2 that addresses these vulnerabilities. Users should apply this official Red Hat update promptly to remediate the issues. Refer to the Red Hat advisory RHSA-2026:4532 and https://access.redhat.com/articles/11258 for detailed update instructions. No additional mitigations are specified by the vendor.
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): * runc: container escape and denial of service due to arbitrary write gadgets and procfs write redirects (CVE-2025-52881) * golang: archive/tar: Unbounded allocation when parsing GNU sparse map (CVE-2025-58183) * golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: SSH client panic due to unexpected SSH_AGENT_SUCCESS (CVE-2025-47913) * github.com/sirupsen/logrus: github.com/sirupsen/logrus: Denial-of-Service due to large single-line payload (CVE-2025-65637) 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 Red Hat security advisory RHSA-2026:4532 addresses four vulnerabilities affecting the buildah package on Red Hat Enterprise Linux 9.2. CVE-2025-52881 involves container escape and denial of service in runc due to arbitrary write gadgets and procfs write redirects. CVE-2025-58183 is an unbounded allocation vulnerability in golang's archive/tar when parsing GNU sparse maps. CVE-2025-47913 causes an SSH client panic in golang.org/x/crypto/ssh/agent due to unexpected SSH_AGENT_SUCCESS messages. CVE-2025-65637 is a denial-of-service vulnerability in github.com/sirupsen/logrus triggered by large single-line payloads. The advisory provides updated buildah packages that include fixes for these issues.
Potential Impact
Successful exploitation of these vulnerabilities could allow container escape, denial of service, unbounded memory allocation leading to resource exhaustion, and SSH client crashes. These impacts could compromise container isolation, cause service disruptions, and affect the stability of systems using the affected buildah versions.
Mitigation Recommendations
An updated buildah package version 1:1.29.5-1.el9_2.2 is available for Red Hat Enterprise Linux 9.2 that addresses these vulnerabilities. Users should apply this official Red Hat update promptly to remediate the issues. Refer to the Red Hat advisory RHSA-2026:4532 and https://access.redhat.com/articles/11258 for detailed update instructions. No additional mitigations are specified by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:4532
- Cve Count
- 4
- Additional Cves
- ["CVE-2025-52881","CVE-2025-58183","CVE-2025-65637"]
- Cvss Version
- null
Threat ID: 6a16096fe29bf47b506368cc
Added to database: 05/26/2026, 20:58:23 UTC
Last enriched: 07/30/2026, 12:21:48 UTC
Last updated: 07/31/2026, 19:30:10 UTC
Views: 101
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