Heap-based Buffer Overflow Affecting pillow package, versions <12.1.1-2ubuntu1.2


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.13% (4th percentile)

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  • Snyk IDSNYK-UBUNTU2604-PILLOW-16655430
  • published9 Jun 2026
  • disclosed9 May 2026

Introduced: 9 May 2026

CVE-2026-42309  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.04 pillow to version 12.1.1-2ubuntu1.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pillow package and not the pillow package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePath.Path, ImageDraw.ImageDraw.polygon and ImageDraw.ImageDraw.line could cause a heap buffer overflow, as nested lists were recursively unpacked beyond the allocated buffer. Coordinate lists are now validated to contain exactly two numeric coordinates. This issue has been patched in version 12.2.0.

CVSS Base Scores

version 3.1