Bug 2468684 (CVE-2026-8177)

Summary: CVE-2026-8177 perl-XML-LibXML: XML::LibXML: Denial of Service via truncated UTF-8 in XML node names
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in XML::LibXML for Perl. A remote attacker could exploit this vulnerability when processing specially crafted XML node names containing incomplete UTF-8 character sequences. This can lead to an out-of-bounds read in heap memory, potentially causing the application to crash and resulting in a denial of service.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-10 22:01:16 UTC 
XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.

A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory.

Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.
Comment 2 errata-xmlrpc 2026-07-14 23:25:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:39547 https://access.redhat.com/errata/RHSA-2026:39547
Comment 3 errata-xmlrpc 2026-07-14 23:59:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:39553 https://access.redhat.com/errata/RHSA-2026:39553
Comment 4 errata-xmlrpc 2026-07-15 12:02:27 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:39878 https://access.redhat.com/errata/RHSA-2026:39878