CVE-2026-112397Pillow: Out-of-bounds access in _imagingmorph on a zero-width image

Description

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's ImageMorph.MorphOp.apply() can access memory before a row buffer for a zero-width image. PPM and PGM input can create an image with width zero, and the native morphology routine indexes outrow[width - 1] without rejecting that geometry. An attacker can supply such an image to an application that applies a morphology operation. This can crash the process. This issue is fixed in version 13.0.0.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://github.com/python-pillow/Pillow/security/advisories/GHSA-58r4-6rv3-gfh8 ExploitVendor Advisory
• https://github.com/python-pillow/Pillow/commit/18f7c0dfee93063c51db6ed0ca8c4da2999dcb64 Patch
• https://github.com/python-pillow/Pillow/releases/tag/13.0.0 Release Notes