2435454 – (CVE-2026-25210) CVE-2026-25210 libexpat: libexpat: Information disclosure and data integrity issues due to integer overflow in buffer reallocation

Bug 2435454 (CVE-2026-25210) - CVE-2026-25210 libexpat: libexpat: Information disclosure and data integrity issues due to integer overflow in buffer reallocation

Summary: CVE-2026-25210 libexpat: libexpat: Information disclosure and data integrity ...

Keywords:
Status:	NEW
Alias:	CVE-2026-25210
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:
Blocks:
TreeView+	depends on / blocked

Reported:	2026-01-30 08:01 UTC by OSIDB Bzimport
Modified:	2026-06-02 08:28 UTC (History)
CC List:	10 users (show)
Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-01-30 08:01:12 UTC

In libexpat before 2.7.4, the doContent function does not properly determine the buffer size bufSize because there is no integer overflow check for tag buffer reallocation.

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