RLSA-2026:49838

Synopsis

Important: osbuild-composer security, bug fix, and enhancement update

Description

A service for building customized OS artifacts, such as VM images and OSTree commits, that uses osbuild under the hood. Besides building images for local usage, it can also upload images directly to cloud. It is compatible with composer-cli and cockpit-composer clients.

Security Fix(es):

* crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)

* crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)

Bug Fix(es) and Enhancement(s):

* bootupctl backend install --auto fails bootupd EFI metadata missing (JIRA:Rocky Linux-185745)

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 products

Rocky Linux 9 aarch64 Rocky Linux 9 ppc64le Rocky Linux 9 s390x Rocky Linux 9 x86_64

Fixes

2456333 2456339

CVEs

CVE-2026-32280 CVE-2026-32281

Affected packages

Rocky Linux 9 aarch64 - AppStream

osbuild-composer-0:165.1-4.el9_8.rocky.0.1.aarch64.rpm osbuild-composer-0:165.1-4.el9_8.rocky.0.1.src.rpm osbuild-composer-core-0:165.1-4.el9_8.rocky.0.1.aarch64.rpm osbuild-composer-core-debuginfo-0:165.1-4.el9_8.rocky.0.1.aarch64.rpm osbuild-composer-debuginfo-0:165.1-4.el9_8.rocky.0.1.aarch64.rpm osbuild-composer-debugsource-0:165.1-4.el9_8.rocky.0.1.aarch64.rpm osbuild-composer-worker-0:165.1-4.el9_8.rocky.0.1.aarch64.rpm osbuild-composer-worker-debuginfo-0:165.1-4.el9_8.rocky.0.1.aarch64.rpm

Rocky Linux 9 ppc64le - AppStream

osbuild-composer-0:165.1-4.el9_8.rocky.0.1.ppc64le.rpm osbuild-composer-0:165.1-4.el9_8.rocky.0.1.src.rpm osbuild-composer-core-0:165.1-4.el9_8.rocky.0.1.ppc64le.rpm osbuild-composer-core-debuginfo-0:165.1-4.el9_8.rocky.0.1.ppc64le.rpm osbuild-composer-debuginfo-0:165.1-4.el9_8.rocky.0.1.ppc64le.rpm osbuild-composer-debugsource-0:165.1-4.el9_8.rocky.0.1.ppc64le.rpm osbuild-composer-worker-0:165.1-4.el9_8.rocky.0.1.ppc64le.rpm osbuild-composer-worker-debuginfo-0:165.1-4.el9_8.rocky.0.1.ppc64le.rpm

Rocky Linux 9 s390x - AppStream

osbuild-composer-0:165.1-4.el9_8.rocky.0.1.s390x.rpm osbuild-composer-0:165.1-4.el9_8.rocky.0.1.src.rpm osbuild-composer-core-0:165.1-4.el9_8.rocky.0.1.s390x.rpm osbuild-composer-core-debuginfo-0:165.1-4.el9_8.rocky.0.1.s390x.rpm osbuild-composer-debuginfo-0:165.1-4.el9_8.rocky.0.1.s390x.rpm osbuild-composer-debugsource-0:165.1-4.el9_8.rocky.0.1.s390x.rpm osbuild-composer-worker-0:165.1-4.el9_8.rocky.0.1.s390x.rpm osbuild-composer-worker-debuginfo-0:165.1-4.el9_8.rocky.0.1.s390x.rpm

Rocky Linux 9 x86_64 - AppStream

osbuild-composer-0:165.1-4.el9_8.rocky.0.1.src.rpm osbuild-composer-0:165.1-4.el9_8.rocky.0.1.x86_64.rpm osbuild-composer-core-0:165.1-4.el9_8.rocky.0.1.x86_64.rpm osbuild-composer-core-debuginfo-0:165.1-4.el9_8.rocky.0.1.x86_64.rpm osbuild-composer-debuginfo-0:165.1-4.el9_8.rocky.0.1.x86_64.rpm osbuild-composer-debugsource-0:165.1-4.el9_8.rocky.0.1.x86_64.rpm osbuild-composer-worker-0:165.1-4.el9_8.rocky.0.1.x86_64.rpm osbuild-composer-worker-debuginfo-0:165.1-4.el9_8.rocky.0.1.x86_64.rpm