Use-After-Free Vulnerability in libxml2 Affecting Multiple Software Applications
CVE-2025-12863

7.5HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
7 November 2025

What is CVE-2025-12863?

A security flaw exists in the xmlSetTreeDoc() function of the libxml2 XML parsing library. This function fails to properly manage memory when XML nodes are transferred between documents. As a result, namespace pointers can erroneously reference a freed memory area once the original document is deleted. This oversight may lead to a use-after-free condition, triggering unexpected behavior such as application crashes during namespace access.

References

https://access.redhat.com/security/cve/CVE-2025-12863
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2413323
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Ahmed Lekssays for reporting this issue.
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CVE-2025-12863 : Use-After-Free Vulnerability in libxml2 Affecting Multiple Software Applications