Use After Free Affecting py3-pillow package, versions <13.0.0-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.44% (37th percentile)

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  • Snyk IDSNYK-WOLFILATEST-PY3PILLOW-21479122
  • published23 Oct 2026
  • disclosed19 Oct 2026

Introduced: 19 Oct 2026

NewCVE-2026-112402  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Wolfi py3-pillow to version 13.0.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream py3-pillow package and not the py3-pillow package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

Pillow is a Python imaging library. Prior to 13.0.0, Pillow can double free image memory when ImagingScaleAffine encounters a selective allocation failure. The affected fast path handles Transform.EXTENT or pure scale-and-translate Transform.AFFINE operations with the default NEAREST resampling. The output image allocation must succeed while the additional per-column lookup allocation fails, after which the error path deletes image storage that later cleanup releases again. An attacker who can drive such a large Image.transform() operation under memory pressure may trigger the failure. This can crash the process and may corrupt memory. This issue is fixed in version 13.0.0.

CVSS Base Scores

version 3.1