CVE-2025-49794

A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path="..."/> schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.

This issue was rated with a severity impact of Important by Red Hat Product Security, as libxml can be used to parse XML coming from the network depending on how the program consumes it and uses the library. Additionally, although the initial report shows a crash due to invalid memory access (A:H), other undefined issues that can present data integrity due to the application overwriting sensitive data are not discarded (I:H).

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

There's no available mitigation other than avoid processing untrusted XML documents before updating to the libxml version containing the fix.