Off-by-one in ImageMagick - CVE-2026-40312

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Main Vulnerability Database Vulnerabilities #VU125873

Off-by-one in ImageMagick - CVE-2026-40312

Published: April 14, 2026


Vulnerability identifier: #VU125873
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-40312
CWE-ID: CWE-193
Exploitation vector: Local 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 an off-by-one error in the MSL decoder when parsing a malicious MSL file. A remote attacker can supply a specially crafted MSL file to cause a denial of service.


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-2026-40312

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