Red Hat alert RHSA-2026:0426-01 (buildah)

An update for buildah is now available for Red Hat Enterprise Linux 9.4
Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of
Important. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

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)

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.

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attribution to Red Hat Inc. and provide a link to the original.

Original: https://access.redhat.com/security/data/csaf/v2/advisories/2026/rhsa-2026_0426.json