Expat 2.4.3 released, includes security fixes

January 16, 2022

Submitted by Sebastian Pipping.

libexpat is a fast streaming XML parser. Alongside libxml2, Expat is one of the most widely used software libre XML parsers written in C, precisely C99. It is cross-platform and licensed under the MIT license.

Expat 2.4.3 has been released earlier today. Besides two minor fixes to the build system, this release is about security fixes. There is a total of 8 CVEs fixed, all related to fixed-size integer math (integer overflow and invalid shifts) near memory allocation. Impact is denial of service, or more.

For more details, please check out the change log.

If you maintain Expat packaging or a bundled copy of Expat or a pinned version of Expat somewhere, please update to 2.4.3. Thank you!

Sebastian Pipping

This article first appeared at blog.hartwork.org.

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