A Denial of Service vulnerability (CVE-2026-8177, CVSS 7.5 HIGH) exists in the perl-XML-LibXML module where processing XML files containing truncated UTF-8 characters in node names can cause the application to crash. This security update for Red Hat Enterprise Linux 9 addresses the issue; specific affected and fixed package version numbers are not provided in the advisory. Administrators should apply the update via their standard Red Hat patching channels.
Red Hat Product Errata RHSA-2026:39553 - Security Advisory Issued: 2026-07-14 Updated: 2026-07-14 RHSA-2026:39553 - Security Advisory Overview Updated Packages Synopsis Important: perl-XML-LibXML security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for perl-XML-LibXML is now available for Red Hat Enterprise Linux 9. 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 This module implements a Perl interface to the GNOME libxml2 library which provides interfaces for parsing and manipulating XML files. This module allows Perl programmers to make use of the highly capable validating XML parser and the high performance DOM implementation. Security Fix(es): perl-XML-LibXML: XML::LibXML: Denial of Service via truncated UTF-8 in XML node names (CVE-2026-8177) 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 Red Hat Enterprise Linux for x86_64 9 x86_64 Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.8 x86_64 Red Hat Enterprise Linux for IBM z Systems 9 s390x Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.8 s390x Red Hat Enterprise Linux for Power, little endian 9 ppc64le Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.8 ppc64le Red Hat Enterprise Linux for ARM 64 9 aarch64 Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.8 aarch64 Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.8 ppc64le Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.8 x86_64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.8 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.8 s390x Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.8 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.8 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.8 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.8 s390x Fixes BZ - 2468684 - CVE-2026-8177 perl-XML-LibXML: XML::LibXML: Denial of Service via truncated UTF-8 in XML node names CVEs CVE-2026-8177 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 9 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 x86_64 perl-XML-LibXML-2.0206-5.el9_8.1.x86_64.rpm SHA-256: b73bcc507549f0d3da0a68d83536586d2ff65da7e6b34714ae74fbd6a912b72c perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.x86_64.rpm SHA-256: 9ad87b4ba1f2839a0fd02a0a421b4888b7d18bce1d7c212aa455e43f4d6365ca perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.x86_64.rpm SHA-256: 21620663ef11c48e581e5404887efbec2818967c7a259b9c7096b179a0fab117 Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 x86_64 perl-XML-LibXML-2.0206-5.el9_8.1.x86_64.rpm SHA-256: b73bcc507549f0d3da0a68d83536586d2ff65da7e6b34714ae74fbd6a912b72c perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.x86_64.rpm SHA-256: 9ad87b4ba1f2839a0fd02a0a421b4888b7d18bce1d7c212aa455e43f4d6365ca perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.x86_64.rpm SHA-256: 21620663ef11c48e581e5404887efbec2818967c7a259b9c7096b179a0fab117 Red Hat Enterprise Linux for IBM z Systems 9 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 s390x perl-XML-LibXML-2.0206-5.el9_8.1.s390x.rpm SHA-256: 9cfbf5aba30e8e8e733bdf62e244135b4da6d57ae80b34a96404db099d7ccdb7 perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.s390x.rpm SHA-256: 55ef283e503db290ef0e949bd5f1b5eade7ac2e5a9399e07d000a2bbd75e4295 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.s390x.rpm SHA-256: 696c47e9d5a8fddd73afba30de468570b891ffb3f16890898ed49b3c4551752a Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 s390x perl-XML-LibXML-2.0206-5.el9_8.1.s390x.rpm SHA-256: 9cfbf5aba30e8e8e733bdf62e244135b4da6d57ae80b34a96404db099d7ccdb7 perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.s390x.rpm SHA-256: 55ef283e503db290ef0e949bd5f1b5eade7ac2e5a9399e07d000a2bbd75e4295 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.s390x.rpm SHA-256: 696c47e9d5a8fddd73afba30de468570b891ffb3f16890898ed49b3c4551752a Red Hat Enterprise Linux for Power, little endian 9 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 ppc64le perl-XML-LibXML-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: ebba4d3a734aacbaaa508b87bd27db3be74b8e298486ff18e542bdfb18f20a5d perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: c8cb75cba81e6a660d6ffcb3d5b25a9b7ed5023f103ed8dadc53f84812894d87 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: f217353232dffc4eaf1ac0dc1a775d6c89307d4ecf91b3229dc04df456ebe06a Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 ppc64le perl-XML-LibXML-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: ebba4d3a734aacbaaa508b87bd27db3be74b8e298486ff18e542bdfb18f20a5d perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: c8cb75cba81e6a660d6ffcb3d5b25a9b7ed5023f103ed8dadc53f84812894d87 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: f217353232dffc4eaf1ac0dc1a775d6c89307d4ecf91b3229dc04df456ebe06a Red Hat Enterprise Linux for ARM 64 9 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 aarch64 perl-XML-LibXML-2.0206-5.el9_8.1.aarch64.rpm SHA-256: 20f4008a483c046eb1faafeaded1268c637b26da31a085590bd684eb9ab28abf perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.aarch64.rpm SHA-256: 0220bc1b192771f2184ee112eb47044522c25a96a0b44277494c121a34ad8f29 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.aarch64.rpm SHA-256: b6462632aa123ad8b79519b37e3ddc8935b5039ec44a6a08a228c4dc0e3e819a Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 aarch64 perl-XML-LibXML-2.0206-5.el9_8.1.aarch64.rpm SHA-256: 20f4008a483c046eb1faafeaded1268c637b26da31a085590bd684eb9ab28abf perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.aarch64.rpm SHA-256: 0220bc1b192771f2184ee112eb47044522c25a96a0b44277494c121a34ad8f29 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.aarch64.rpm SHA-256: b6462632aa123ad8b79519b37e3ddc8935b5039ec44a6a08a228c4dc0e3e819a Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 ppc64le perl-XML-LibXML-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: ebba4d3a734aacbaaa508b87bd27db3be74b8e298486ff18e542bdfb18f20a5d perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: c8cb75cba81e6a660d6ffcb3d5b25a9b7ed5023f103ed8dadc53f84812894d87 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.ppc64le.rpm SHA-256: f217353232dffc4eaf1ac0dc1a775d6c89307d4ecf91b3229dc04df456ebe06a Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 x86_64 perl-XML-LibXML-2.0206-5.el9_8.1.x86_64.rpm SHA-256: b73bcc507549f0d3da0a68d83536586d2ff65da7e6b34714ae74fbd6a912b72c perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.x86_64.rpm SHA-256: 9ad87b4ba1f2839a0fd02a0a421b4888b7d18bce1d7c212aa455e43f4d6365ca perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.x86_64.rpm SHA-256: 21620663ef11c48e581e5404887efbec2818967c7a259b9c7096b179a0fab117 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 aarch64 perl-XML-LibXML-2.0206-5.el9_8.1.aarch64.rpm SHA-256: 20f4008a483c046eb1faafeaded1268c637b26da31a085590bd684eb9ab28abf perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.aarch64.rpm SHA-256: 0220bc1b192771f2184ee112eb47044522c25a96a0b44277494c121a34ad8f29 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.aarch64.rpm SHA-256: b6462632aa123ad8b79519b37e3ddc8935b5039ec44a6a08a228c4dc0e3e819a Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 s390x perl-XML-LibXML-2.0206-5.el9_8.1.s390x.rpm SHA-256: 9cfbf5aba30e8e8e733bdf62e244135b4da6d57ae80b34a96404db099d7ccdb7 perl-XML-LibXML-debuginfo-2.0206-5.el9_8.1.s390x.rpm SHA-256: 55ef283e503db290ef0e949bd5f1b5eade7ac2e5a9399e07d000a2bbd75e4295 perl-XML-LibXML-debugsource-2.0206-5.el9_8.1.s390x.rpm SHA-256: 696c47e9d5a8fddd73afba30de468570b891ffb3f16890898ed49b3c4551752a Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.8 SRPM perl-XML-LibXML-2.0206-5.el9_8.1.src.rpm SHA-256: 4b9e1a393ca38e72c76f00a815323124c30cd6f5b3786bab6c630862d2e155b2 x86_64 perl-XML-LibXML-2.0206-5.el9_8.1.x86_64.rpm SHA-256: b73bcc507549f0d3