Time-of-check Time-of-use (TOCTOU) Race Condition in ImageMagick - CVE-2026-56377

Vulnerability identifier: #VU133103

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-56377

CWE-ID: CWE-367

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to create or truncate files that are disallowed by the security policy.

The vulnerability exists due to time-of-check time-of-use race condition in the policy check logic when handling file creation or truncation operations. A local user can trigger an incorrect check to create or truncate files that are disallowed by the security policy.

This is relevant for sandboxed conversion services that rely on ImageMagick path policies for write-boundary enforcement.

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

Install security update from vendor's website.

ImageMagick - addressed in versions 6.9.13-48, 7.1.2-24
ImageMagick-config-6-SUSE - update to 6.8.8.1-71.264.1
libMagick++-devel - addressed in versions 6.8.8.1-71.264.1, 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
libMagickCore-6_Q16-1 - update to 6.8.8.1-71.264.1
libMagickWand-6_Q16-1-debuginfo - update to 6.8.8.1-71.264.1
libMagickWand-6_Q16-1 - update to 6.8.8.1-71.264.1
ImageMagick-debugsource - addressed in versions 6.8.8.1-71.264.1, 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
libMagickCore-6_Q16-1-debuginfo - update to 6.8.8.1-71.264.1
ImageMagick-devel - addressed in versions 6.8.8.1-71.264.1, 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick-debuginfo - addressed in versions 6.8.8.1-71.264.1, 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick-config-6-upstream - update to 6.8.8.1-71.264.1
libMagick++-devel-32bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickWand-7_Q16HDRI10-64bit-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagick++-7_Q16HDRI5-32bit-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
ImageMagick-devel-32bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickCore-7_Q16HDRI10-32bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickCore-7_Q16HDRI10-32bit-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickWand-7_Q16HDRI10-32bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagick++-7_Q16HDRI5-32bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickWand-7_Q16HDRI10-32bit-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickCore-7_Q16HDRI10-64bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagick++-7_Q16HDRI5-64bit-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagick++-7_Q16HDRI5-64bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickCore-7_Q16HDRI10-64bit-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagick++-devel-64bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
ImageMagick-devel-64bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickWand-7_Q16HDRI10-64bit - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
ImageMagick-doc - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickCore-7_Q16HDRI10 - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
libMagick++-7_Q16HDRI5-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
perl-PerlMagick-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick-extra - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
libMagickCore-7_Q16HDRI10-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
perl-PerlMagick - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick-extra-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2
ImageMagick-config-7-upstream - update to 7.1.0.9-150400.6.101.1
ImageMagick-config-7-SUSE - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
libMagickWand-7_Q16HDRI10 - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
libMagick++-7_Q16HDRI5 - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
libMagickWand-7_Q16HDRI10-debuginfo - addressed in versions 7.1.0.9-150400.6.101.1, 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick-config-7-upstream-secure - addressed in versions 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick-config-7-upstream-open - addressed in versions 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick-config-7-upstream-limited - addressed in versions 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
ImageMagick-config-7-upstream-websafe - addressed in versions 7.1.1.21-150600.3.80.2, 7.1.1.43-150700.3.70.1
imagemagick (Debian package) - update to 8:7.1.1.43+dfsg1-1+deb13u11

• https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-gm48-c7f2-v67p

• Multiple vulnerabilities in ImageMagick
• Debian update for imagemagick
• SUSE update for ImageMagick
• SUSE update for ImageMagick
• SUSE update for ImageMagick
• SUSE update for ImageMagick