Bug 2484620 (CVE-2026-50219) - CVE-2026-50219 expat: libexpat: Use-after-free vulnerability due to improper handler call depth tracking
Summary: CVE-2026-50219 expat: libexpat: Use-after-free vulnerability due to improper ...
Keywords:
Status: NEW
Alias: CVE-2026-50219
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2486181 2486180
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-04 06:01 UTC by OSIDB Bzimport
Modified: 2026-09-08 16:40 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:65161 0 None None None 2026-09-08 09:27:01 UTC
Red Hat Product Errata RHBA-2026:65533 0 None None None 2026-09-08 16:40:44 UTC
Red Hat Product Errata RHSA-2026:64809 0 None None None 2026-09-08 04:29:23 UTC
Red Hat Product Errata RHSA-2026:64810 0 None None None 2026-09-08 05:51:24 UTC
Red Hat Product Errata RHSA-2026:64812 0 None None None 2026-09-08 06:42:38 UTC

Description OSIDB Bzimport 2026-06-04 06:01:30 UTC 
libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,
Comment 2 errata-xmlrpc 2026-09-08 04:29:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:64809 https://access.redhat.com/errata/RHSA-2026:64809
Comment 3 errata-xmlrpc 2026-09-08 05:51:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:64810 https://access.redhat.com/errata/RHSA-2026:64810
Comment 4 errata-xmlrpc 2026-09-08 06:42:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:64812 https://access.redhat.com/errata/RHSA-2026:64812
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