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RLSA-2026:72663

Security Mirrored from RHSA-2026:72663
Issued at: 2026-09-30
Updated at: 2026-09-30

Advisory content derived from Red Hat RHSA-2026:72663, © Red Hat, Inc., used under CC BY 4.0, with modifications.

Synopsis

Important: expat security update



Description

Expat is a C library for parsing XML documents.

Security Fix(es):

* expat: Expat: Denial of Service via quadratic complexity in attribute processing (CVE-2026-66046)

* expat: Expat: XML Injection via Malformed UTF-16 Input (CVE-2026-93990)

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

2517901 2538967

CVEs

CVE-2026-66046 CVE-2026-93990

Affected packages

Rocky Linux 9 aarch64 - BaseOS

expat-0:2.5.0-6.el9_8.5.aarch64.rpm expat-0:2.5.0-6.el9_8.5.src.rpm expat-debuginfo-0:2.5.0-6.el9_8.5.aarch64.rpm expat-debugsource-0:2.5.0-6.el9_8.5.aarch64.rpm

Rocky Linux 9 x86_64 - BaseOS

expat-0:2.5.0-6.el9_8.5.i686.rpm expat-0:2.5.0-6.el9_8.5.src.rpm expat-0:2.5.0-6.el9_8.5.x86_64.rpm expat-debuginfo-0:2.5.0-6.el9_8.5.i686.rpm expat-debuginfo-0:2.5.0-6.el9_8.5.x86_64.rpm expat-debugsource-0:2.5.0-6.el9_8.5.i686.rpm expat-debugsource-0:2.5.0-6.el9_8.5.x86_64.rpm

Rocky Linux 9 ppc64le - BaseOS

expat-0:2.5.0-6.el9_8.5.ppc64le.rpm expat-0:2.5.0-6.el9_8.5.src.rpm expat-debuginfo-0:2.5.0-6.el9_8.5.ppc64le.rpm expat-debugsource-0:2.5.0-6.el9_8.5.ppc64le.rpm

Rocky Linux 9 s390x - BaseOS

expat-0:2.5.0-6.el9_8.5.s390x.rpm expat-0:2.5.0-6.el9_8.5.src.rpm expat-debuginfo-0:2.5.0-6.el9_8.5.s390x.rpm expat-debugsource-0:2.5.0-6.el9_8.5.s390x.rpm

Rocky Linux 9 aarch64 - AppStream

expat-devel-0:2.5.0-6.el9_8.5.aarch64.rpm

Rocky Linux 9 x86_64 - AppStream

expat-devel-0:2.5.0-6.el9_8.5.i686.rpm expat-devel-0:2.5.0-6.el9_8.5.x86_64.rpm

Rocky Linux 9 ppc64le - AppStream

expat-devel-0:2.5.0-6.el9_8.5.ppc64le.rpm

Rocky Linux 9 s390x - AppStream

expat-devel-0:2.5.0-6.el9_8.5.s390x.rpm