Bug 2524648 - CVE-2026-76957 mingw-expat: libexpat: Memory corruption vulnerability allows arbitrary code execution or denial of service [fedora-all]
Summary: CVE-2026-76957 mingw-expat: libexpat: Memory corruption vulnerability allows ...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: mingw-expat
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Richard W.M. Jones
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["6a4b62e6-4e25-495b-9754-e...
Depends On:
Blocks: CVE-2026-76957
TreeView+ depends on / blocked
 
Reported: 2026-08-26 19:35 UTC by Laura Pardo
Modified: 2026-08-26 19:35 UTC (History)
2 users (show)

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

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Description Laura Pardo 2026-08-26 19:35:36 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

libexpat before 2.8.4 lacks handler call depth tracking with custom encoding callbacks. Thus, a use-after-free can occur. NOTE: this is similar to CVE-2026-50219, CVE-2026-56131 and CVE-2026-56412.
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