Issued:
2026-03-05
Updated:
2026-03-05

RHSA-2026:3840 - Important: image-builder security update

Synopsis

Important: image-builder security update

Type/Severity

Security Advisory Important

Topic

An update for image-builder is now available for Red Hat Enterprise Linux 10.

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.

Description

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

Security Fix(es):

  • 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)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_6410x86_64
Red Hat Enterprise Linux for Power, little endian10ppc64le
Red Hat Enterprise Linux for IBM z Systems10s390x
Red Hat Enterprise Linux for ARM 6410aarch64

Updated Packages

  • image-builder-debuginfo-31-4.el10_1.ppc64le.rpm
  • image-builder-31-4.el10_1.ppc64le.rpm
  • image-builder-debugsource-31-4.el10_1.ppc64le.rpm
  • image-builder-debugsource-31-4.el10_1.s390x.rpm
  • image-builder-debugsource-31-4.el10_1.x86_64.rpm
  • image-builder-31-4.el10_1.x86_64.rpm
  • image-builder-debuginfo-31-4.el10_1.aarch64.rpm
  • image-builder-debuginfo-31-4.el10_1.x86_64.rpm
  • image-builder-31-4.el10_1.s390x.rpm
  • image-builder-31-4.el10_1.src.rpm
  • image-builder-debuginfo-31-4.el10_1.s390x.rpm
  • image-builder-debugsource-31-4.el10_1.aarch64.rpm
  • image-builder-31-4.el10_1.aarch64.rpm

Fixes

CVEs

References

Additional information