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Vulnerability record · CVE-2019-19911 · published 5 January 2020

CVE-2019-19911: Python pillow integer overflow vulnerability

Python · Pillow

There is a DoS vulnerability in Pillow before 6.2.2 caused by FpxImagePlugin.py calling the range function on an unvalidated 32-bit integer if the number of bands is large. On Windows running 32-bit Python, this results in an OverflowError or MemoryError due to the 2 GB limit. However, on Linux running 64-bit Python this results in the process being terminated by the OOM killer.

7.5 CVSS 3.1 High EPSS 2.1% · top 18.9% CWE-190 · Integer overflow
7.5CVSS 3.1 base score, v2 5.0
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

There is a DoS vulnerability in Pillow before 6.2.2 caused by FpxImagePlugin.py calling the range function on an unvalidated 32-bit integer if the number of bands is large. On Windows running 32-bit Python, this results in an OverflowError or MemoryError due to the 2 GB limit. However, on Linux running 64-bit Python this results in the process being terminated by the OOM killer.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3DUMIBUYGJRAVJCTFUWBRLV
https://pillow.readthedocs.io/en/stable/releasenotes/6.2.2.html Release NotesThird Party Advisory
https://usn.ubuntu.com/4272-1/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4631 Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3DUMIBUYGJRAVJCTFUWBRLV
https://pillow.readthedocs.io/en/stable/releasenotes/6.2.2.html Release NotesThird Party Advisory
https://usn.ubuntu.com/4272-1/ Third Party Advisory
https://www.debian.org/security/2020/dsa-4631 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-19911), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.