CVE-2021-20309

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A flaw was found in ImageMagick in versions before 7.0.11 and before 6.9.12, where a division by zero in WaveImage() of MagickCore/visual-effects.c may trigger undefined behavior via a crafted image file submitted to an application using ImageMagick. The highest threat from this vulnerability is to system availability.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-369

Affected software

Vendor	Product	Versions
n/a	ImagemMagick	ImageMagick 7.0.11, ImageMagick 6.9.12

References

https://bugzilla.redhat.com/show_bug.cgi?id=1946722Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00000.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00020.html
https://bugzilla.redhat.com/show_bug.cgi?id=1946722Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00000.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/05/msg00020.html

Timeline

Published: May 11, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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