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Added security release notes

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Andrew Murray 2026-04-01 16:49:20 +11:00
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docs/releasenotes/12.2.0.rst
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Security
========
TODO
^^^^
Prevent FITS decompression bomb
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TODO
When decompressing GZIP data from a FITS image, Pillow did not limit the amount of data
being read, meaning that it was vulnerable to GZIP decompression bombs. This was
introduced in Pillow 10.3.0.
:cve:`YYYY-XXXXX`: TODO
^^^^^^^^^^^^^^^^^^^^^^^
The data being read is now limited to only the necessary amount.
TODO
Fix OOB write with invalid tile extents
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Pillow 12.1.1 added improved checks for tile extents to prevent an OOB write from
specially crafted PSD images in Pillow >= 10.3.0. However, these checks did not
consider integer overflow. This has been corrected.
Prevent PDF parsing trailer infinite loop
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
When parsing a PDF, if a trailer refers to itself, or a more complex cyclic loop
exists, then an infinite loop occurs. Pillow now keeps a record of which trailers it
has already processed. PdfParser was added in Pillow 4.2.0.
Integer overflow when processing fonts
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If a font advances for each glyph by an exceeding large amount, when Pillow keeps track
of the current position, it may lead to an integer overflow. This has been fixed.
API changes
===========