News and History of the PNG Development Group from 2022

Herein lie news items and historical stuff primarily of interest to the Portable Network Graphics Development Group itself. Feel free to poke around even if you're not a member, though. Note that some of the links, particularly the older ones, are broken; in some cases this is explained by later entries. Other links (CompuServe, tcg.arl.mil) have fallen prey to reorganizations or upgrades; should they ever reappear, the entries below will be updated as needed.

On the other hand, keep in mind that this is history here...updates to older entries are really not a priority these days.

• current - see here

• 21 November 2022 - libpng 1.6.39 is released with various fixes and improvements, including a change to signal large PNG chunks as benign errors rather than hard errors.

• 13 October 2022 - zlib 1.2.13 is released with a fix for a buffer-overflow bug in inflateGetHeader() (security vulnerability), as well as other improvements. (Also available here.)

• 14 September 2022 - libpng 1.6.38 is released with fixes for various errors in the handling of tRNS, hIST and eXIf; additional configurations and scripts for continuous integration; stability improvements across all platforms; and documentation updates.

• 27 March 2022 - zlib 1.2.12 is released with a fix for out-of-bounds access when deflating with Z_FIXED (security vulnerability), as well as other improvements. (It can also be downloaded here.)

Here are some related PNG pages at this site:

• Current News of the PNG Development Group
• Historical PNG news:
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• History of PNG
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• PNG Home Page
• Complete PNG Site Map

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