PYSEC-2025-61: pillow fixed in 89f1f4626a2aaf5f3d5ca6437f41def2998fbe09 and 11.3.0

PYSEC-2025-61 PUBLISHED CVSS 9.300000190734863 CRITICAL

Record from OSV · Published July 1, 2025

pillow is fixed in 89f1f4626a2aaf5f3d5ca6437f41def2998fbe09 and 11.3.0 (PyPI)

Pillow is a Python imaging library. In versions 11.2.0 to before 11.3.0, there is a heap buffer overflow when writing a sufficiently large (>64k encoded with default settings) image in the DDS format due to writing into a buffer without checking for available space. This only affects users who save untrusted data as a compressed DDS image. This issue has been patched in version 11.3.0.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
pillow	PyPI	89f1f4626a2aaf5f3d5ca6437f41def2998fbe09, 11.3.0

Risk scores

CVSS 4.0

9.300000190734863

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected products

Vendor	Product	Versions
PyPI	pillow	0, 11.2.0, 11.2.1

Timeline

Jul 1, 2025 CVE Published

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