Heap-based buffer overflow in ImageMagick - CVE-2026-40183

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Main Vulnerability Database Vulnerabilities #VU125872

Heap-based buffer overflow in ImageMagick - CVE-2026-40183

Published: April 14, 2026


Vulnerability identifier: #VU125872
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40183
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to heap-based buffer overflow in the JXL encoder when encoding an image as 16-bit floats. A remote attacker can trick the victim into processing a specially crafted image to cause a denial of service.

User interaction is required to process the crafted image.


Affected software

ImageMagick
SUSE Linux Enterprise Server 15 SP6
Debian Linux
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Desktop Applications Module
Development Tools Module
openSUSE Leap
openEuler
libMagick++-7_Q16HDRI5
libMagickCore-7_Q16HDRI10
perl-PerlMagick
ImageMagick-devel
libMagick++-7_Q16HDRI5-debuginfo
ImageMagick-config-7-SUSE
ImageMagick-config-7-upstream-open
libMagickWand-7_Q16HDRI10-debuginfo
ImageMagick-extra-debuginfo
libMagickWand-7_Q16HDRI10
libMagickCore-7_Q16HDRI10-debuginfo
libMagick++-devel
ImageMagick-debuginfo
ImageMagick-extra
ImageMagick-debugsource
perl-PerlMagick-debuginfo
ImageMagick-config-7-upstream-websafe
ImageMagick
ImageMagick-config-7-upstream-limited
ImageMagick-devel-32bit
ImageMagick-devel-64bit
libMagickWand-7_Q16HDRI10-64bit
libMagick++-7_Q16HDRI5-64bit
libMagickCore-7_Q16HDRI10-64bit-debuginfo
libMagick++-7_Q16HDRI5-64bit-debuginfo
libMagick++-devel-64bit
libMagickWand-7_Q16HDRI10-64bit-debuginfo
libMagickCore-7_Q16HDRI10-64bit
ImageMagick-doc
libMagick++-7_Q16HDRI5-32bit
libMagickWand-7_Q16HDRI10-32bit-debuginfo
libMagickWand-7_Q16HDRI10-32bit
libMagick++-devel-32bit
libMagickCore-7_Q16HDRI10-32bit-debuginfo
libMagickCore-7_Q16HDRI10-32bit
libMagick++-7_Q16HDRI5-32bit-debuginfo
ImageMagick-config-7-upstream-secure
imagemagick (Debian package)
ImageMagick-perl
ImageMagick-c++
ImageMagick-help
ImageMagick-c++-devel

How to mitigate CVE-2026-40183

Install security update from vendor's website.

ImageMagick - update to 7.1.2-19
libMagick++-7_Q16HDRI5 - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
libMagickCore-7_Q16HDRI10 - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
perl-PerlMagick - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-devel - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
libMagick++-7_Q16HDRI5-debuginfo - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-config-7-SUSE - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-config-7-upstream-open - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
libMagickWand-7_Q16HDRI10-debuginfo - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-extra-debuginfo - update to 7.1.1.21-150600.3.55.1
libMagickWand-7_Q16HDRI10 - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
libMagickCore-7_Q16HDRI10-debuginfo - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
libMagick++-devel - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-debuginfo - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-extra - update to 7.1.1.21-150600.3.55.1
ImageMagick-debugsource - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
perl-PerlMagick-debuginfo - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-config-7-upstream-websafe - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-config-7-upstream-limited - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
ImageMagick-devel-32bit - update to 7.1.1.21-150600.3.55.1
ImageMagick-devel-64bit - update to 7.1.1.21-150600.3.55.1
libMagickWand-7_Q16HDRI10-64bit - update to 7.1.1.21-150600.3.55.1
libMagick++-7_Q16HDRI5-64bit - update to 7.1.1.21-150600.3.55.1
libMagickCore-7_Q16HDRI10-64bit-debuginfo - update to 7.1.1.21-150600.3.55.1
libMagick++-7_Q16HDRI5-64bit-debuginfo - update to 7.1.1.21-150600.3.55.1
libMagick++-devel-64bit - update to 7.1.1.21-150600.3.55.1
libMagickWand-7_Q16HDRI10-64bit-debuginfo - update to 7.1.1.21-150600.3.55.1
libMagickCore-7_Q16HDRI10-64bit - update to 7.1.1.21-150600.3.55.1
ImageMagick-doc - update to 7.1.1.21-150600.3.55.1
libMagick++-7_Q16HDRI5-32bit - update to 7.1.1.21-150600.3.55.1
libMagickWand-7_Q16HDRI10-32bit-debuginfo - update to 7.1.1.21-150600.3.55.1
libMagickWand-7_Q16HDRI10-32bit - update to 7.1.1.21-150600.3.55.1
libMagick++-devel-32bit - update to 7.1.1.21-150600.3.55.1
libMagickCore-7_Q16HDRI10-32bit-debuginfo - update to 7.1.1.21-150600.3.55.1
libMagickCore-7_Q16HDRI10-32bit - update to 7.1.1.21-150600.3.55.1
libMagick++-7_Q16HDRI5-32bit-debuginfo - update to 7.1.1.21-150600.3.55.1
ImageMagick-config-7-upstream-secure - addressed in versions 7.1.1.21-150600.3.55.1, 7.1.1.43-150700.3.47.1
imagemagick (Debian package) - update to 8:7.1.1.43+dfsg1-1+deb13u8
ImageMagick-perl - update to 7.1.2.19-1
ImageMagick-devel - update to 7.1.2.19-1
ImageMagick-c++ - update to 7.1.2.19-1
ImageMagick-help - update to 7.1.2.19-1
ImageMagick - update to 7.1.2.19-1
ImageMagick-c++-devel - update to 7.1.2.19-1
ImageMagick-debugsource - update to 7.1.2.19-1
ImageMagick-debuginfo - update to 7.1.2.19-1

External References

Related Security Bulletins