Pillow/docs/releasenotes/8.1.1.rst

8.1.1
-----


Security
========

:cve:`CVE-2021-25289`: The previous fix for :cve:`CVE-2020-35654` was insufficient
due to incorrect error checking in ``TiffDecode.c``.

:cve:`CVE-2021-25290`: In ``TiffDecode.c``, there is a negative-offset ``memcpy``
with an invalid size.

:cve:`CVE-2021-25291`: In ``TiffDecode.c``, invalid tile boundaries could lead to
an out-of-bounds read in ``TIFFReadRGBATile``.

:cve:`CVE-2021-25292`: The PDF parser has a catastrophic backtracking regex
that could be used as a DOS attack.

:cve:`CVE-2021-25293`: There is an out-of-bounds read in ``SgiRleDecode.c``,
since Pillow 4.3.0.

There is an exhaustion of memory DOS in the ICNS, ICO, and BLP
container formats where Pillow did not properly check the reported
size of the contained image. These images could cause arbitrarily
large memory allocations. This was reported by Jiayi Lin, Luke
Shaffer, Xinran Xie, and Akshay Ajayan of
`Arizona State University <https://www.asu.edu/>`_.


Other Changes
=============

A crash with the feature flags for libjpeg and WebP on unreleased Python 3.10 has been
fixed (:issue:`5193`).