Out of bounds write in Pillow

CRITICAL 9.8CVE-2021-25289 · BIT-pillow-2021-25289 · GHSA-57h3-9rgr-c24m · Published 19/03/2021 · updated 17/06/2026

Package	Affected versions	Patched versions
pillow PyPI	`< 8.1.1`	`8.1.1`
pillow python	`< 8.1.1`	`8.1.1`

Description

An issue was discovered in Pillow before 8.1.1. TiffDecode has a heap-based buffer overflow when decoding crafted YCbCr files because of certain interpretation conflicts with LibTIFF in RGBA mode. NOTE: this issue exists because of an incomplete fix for CVE-2020-35654.

NVD description

References

nvd.nist.gov/vuln/detail/CVE-2021-25289 · ADVISORY
python-pillow/Pillow commit 3fee28e · WEB
python-pillow/Pillow commit cbfdde7 · WEB
GitHub Advisory GHSA-57h3-9rgr-c24m · ADVISORY
pypa/advisory-database · WEB
python-pillow/Pillow · WEB
pillow.readthedocs.io/en/stable/releasenotes/8.1.1.html · WEB
security.gentoo.org/glsa/202107-33 · WEB

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