NULL pointer dereference in ImageMagick - CVE-2026-23952

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Main Vulnerability Database Vulnerabilities #VU121669

NULL pointer dereference in ImageMagick - CVE-2026-23952

Published: January 20, 2026


Vulnerability identifier: #VU121669
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-23952
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in MSL parser within "comment" tag before image load. A remote user can pass specially crafted data to the application and perform a denial of service (DoS) attack.


Affected software

ImageMagick
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP4
Debian Linux
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
Ubuntu
Desktop Applications Module
Development Tools Module
openSUSE Leap
openEuler
Anolis OS
imagemagick (Ubuntu package)
ImageMagick-debugsource
ImageMagick-devel
libMagickCore-6_Q16-1
libMagickCore-6_Q16-1-debuginfo
libMagickWand-6_Q16-1-debuginfo
ImageMagick-config-6-SUSE
libMagickWand-6_Q16-1
ImageMagick-debuginfo
ImageMagick-config-6-upstream
libMagick++-devel
imagemagick (Debian package)
ImageMagick-help
ImageMagick-perl
ImageMagick-c++-devel
ImageMagick-c++
ImageMagick
libMagickWand-7_Q16HDRI10-64bit-debuginfo
libMagickCore-7_Q16HDRI10-32bit
libMagickWand-7_Q16HDRI10-32bit
libMagick++-devel-32bit
libMagick++-7_Q16HDRI5-32bit-debuginfo
libMagick++-7_Q16HDRI5-32bit
libMagickWand-7_Q16HDRI10-debuginfo
ImageMagick-devel-32bit
ImageMagick-doc
ImageMagick-config-7-upstream
libMagick++-7_Q16HDRI5-64bit
libMagick++-7_Q16HDRI5-64bit-debuginfo
libMagickWand-7_Q16HDRI10-64bit
ImageMagick-devel-64bit
libMagick++-devel-64bit
libMagickCore-7_Q16HDRI10-64bit
libMagickCore-7_Q16HDRI10-64bit-debuginfo
libMagickCore-7_Q16HDRI10-32bit-debuginfo
ImageMagick-extra
libMagick++-7_Q16HDRI5-debuginfo
libMagick++-7_Q16HDRI5
perl-PerlMagick-debuginfo
libMagickCore-7_Q16HDRI10-debuginfo
ImageMagick-config-7-SUSE
libMagickWand-7_Q16HDRI10
perl-PerlMagick
libMagickCore-7_Q16HDRI10
ImageMagick-extra-debuginfo
libMagickWand-7_Q16HDRI10-32bit-debuginfo
ImageMagick-config-7-upstream-secure
ImageMagick-config-7-upstream-websafe
ImageMagick-config-7-upstream-open
ImageMagick-config-7-upstream-limited
ImageMagick-libs
ImageMagick-djvu

How to mitigate CVE-2026-23952

Install updates from vendor's website.

ImageMagick - addressed in versions 6.9.13-38, 7.1.2-13
imagemagick (Ubuntu package) - addressed in versions 8:6.7.7.10-6ubuntu3.13+esm20, 8:6.8.9.9-7ubuntu5.16+esm19, 8:6.9.7.4+dfsg-16ubuntu6.15+esm11, 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm9, 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm9, 8:6.9.12.98+dfsg1-5.2ubuntu0.1~esm8
ImageMagick-debugsource - addressed in versions 6.8.8.1-71.227.1, 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-devel - addressed in versions 6.8.8.1-71.227.1, 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
libMagickCore-6_Q16-1 - update to 6.8.8.1-71.227.1
libMagickCore-6_Q16-1-debuginfo - update to 6.8.8.1-71.227.1
libMagickWand-6_Q16-1-debuginfo - update to 6.8.8.1-71.227.1
ImageMagick-config-6-SUSE - update to 6.8.8.1-71.227.1
libMagickWand-6_Q16-1 - update to 6.8.8.1-71.227.1
ImageMagick-debuginfo - addressed in versions 6.8.8.1-71.227.1, 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-config-6-upstream - update to 6.8.8.1-71.227.1
libMagick++-devel - addressed in versions 6.8.8.1-71.227.1, 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
imagemagick (Debian package) - addressed in versions 8:6.9.11.60+dfsg-1.6+deb12u6, 8:7.1.1.43+dfsg1-1+deb13u5
ImageMagick-debuginfo - addressed in versions 6.9.13.38-1, 7.1.2.13-1
ImageMagick-help - addressed in versions 6.9.13.38-1, 7.1.2.13-1
ImageMagick-perl - addressed in versions 6.9.13.38-1, 7.1.2.13-1
ImageMagick-devel - addressed in versions 6.9.13.38-1, 7.1.2.13-1
ImageMagick-debugsource - addressed in versions 6.9.13.38-1, 7.1.2.13-1
ImageMagick-c++-devel - addressed in versions 6.9.13.38-1, 7.1.2.13-1
ImageMagick-c++ - addressed in versions 6.9.13.38-1, 7.1.2.13-1
ImageMagick - addressed in versions 6.9.13.38-1, 7.1.2.13-1
libMagickWand-7_Q16HDRI10-64bit-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagickCore-7_Q16HDRI10-32bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagickWand-7_Q16HDRI10-32bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagick++-devel-32bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagick++-7_Q16HDRI5-32bit-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagick++-7_Q16HDRI5-32bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagickWand-7_Q16HDRI10-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-devel-32bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
ImageMagick-doc - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
ImageMagick-config-7-upstream - update to 7.1.0.9-150400.6.64.1
libMagick++-7_Q16HDRI5-64bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagick++-7_Q16HDRI5-64bit-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagickWand-7_Q16HDRI10-64bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
ImageMagick-devel-64bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagick++-devel-64bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagickCore-7_Q16HDRI10-64bit - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagickCore-7_Q16HDRI10-64bit-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagickCore-7_Q16HDRI10-32bit-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
ImageMagick-extra - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagick++-7_Q16HDRI5-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
libMagick++-7_Q16HDRI5 - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
perl-PerlMagick-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
libMagickCore-7_Q16HDRI10-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-config-7-SUSE - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
libMagickWand-7_Q16HDRI10 - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
perl-PerlMagick - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
libMagickCore-7_Q16HDRI10 - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-extra-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
libMagickWand-7_Q16HDRI10-32bit-debuginfo - addressed in versions 7.1.0.9-150400.6.64.1, 7.1.1.21-150600.3.38.1
ImageMagick-config-7-upstream-secure - addressed in versions 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-config-7-upstream-websafe - addressed in versions 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-config-7-upstream-open - addressed in versions 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-config-7-upstream-limited - addressed in versions 7.1.1.21-150600.3.38.1, 7.1.1.43-150700.3.33.1
ImageMagick-libs - update to 7.1.2.8-6
ImageMagick - update to 7.1.2.8-6
ImageMagick-c++ - update to 7.1.2.8-6
ImageMagick-c++-devel - update to 7.1.2.8-6
ImageMagick-devel - update to 7.1.2.8-6
ImageMagick-djvu - update to 7.1.2.8-6
ImageMagick-doc - update to 7.1.2.8-6
ImageMagick-perl - update to 7.1.2.8-6

External References

Related Security Bulletins