The previous fix for 2020-35654 was insufficient due to incorrect error checking in TiffDecode.c.
In TiffDecode.c, there is a negative-offset memcpy with an invalid size.
In TiffDecode.c, invalid tile boundaries could lead to an out-of-bounds read in TIFFReadRGBATile.
The PDF parser has a catastrophic backtracking regex that could be used as a DOS attack.
There is an out-of-bounds read in SgiRleDecode.c since Pillow 4.3.0.
A crash with the feature flags for libimagequant, libjpeg-turbo, WebP and XCB on unreleased Python 3.10 has been fixed (5193).