Red Hat alert RHSA-2026:1377-01 (image-builder)

An update for image-builder is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of
Moderate. 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.

A local binary for building customized OS artifacts such as VM images and
OSTree commits. Uses osbuild under the hood.

Security Fix(es):

* 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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Original: https://access.redhat.com/security/data/csaf/v2/advisories/2026/rhsa-2026_1377.json