2513021 – (CVE-2026-72522) CVE-2026-72522 expat: libexpat: Denial of Service due to incorrect Unicode surrogate handling

Bug 2513021 (CVE-2026-72522) - CVE-2026-72522 expat: libexpat: Denial of Service due to incorrect Unicode surrogate handling

Summary: CVE-2026-72522 expat: libexpat: Denial of Service due to incorrect Unicode su...

Keywords:
Status:	NEW
Alias:	CVE-2026-72522
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	medium
Severity:	medium
Target Milestone:	---
Assignee:	Product Security DevOps Team
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:	2513993
Blocks:
TreeView+	depends on / blocked

Reported:	2026-08-10 03:51 UTC by OSIDB Bzimport
Modified:	2026-08-11 14:46 UTC (History)
CC List:	5 users (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-08-10 03:51:13 UTC

libexpat before 2.8.3 has an out-of-bounds read and resultant infinite loop because low surrogates are treated the same as high surrogates during Unicode processing in the *_toUtf16 functions.

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