libxml2-2.9.13-3.el9.1

The libxml2 library is a development toolbox providing the implementation of various XML standards.

Security Fix(es):

* libxml2: NULL dereference in xmlSchemaFixupComplexType (CVE-2023-28484)
* libxml2: Hashing of empty dict strings isn't deterministic (CVE-2023-29469)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

CVE-2023-28484
In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c.
CVE-2023-29469
An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).