CVE-2026-56378: ImageMagick: Malicious PCD files trigger 1‑byte heap Out-of-bounds Read and DoS

Published Feb 25, 2026
·
Updated

ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of service and potential disclosure of an adjacent heap byte.

Other sources

The PCD coder’s DecodeImage loop allows a crafted PCD file to trigger a 1‑byte heap out-of-bounds read when decoding an image (Denial of service) and potential disclosure of adjacent heap byte.

— OSV

Affected Software

27 affected componentsFixes available
ImageMagick ImageMagick 7<7.1.2-15
ImageMagick ImageMagick 6<6.9.13-40
ImageMagick ImageMagick>=6.9.0-0<6.9.13-40
ImageMagick ImageMagick>=7.1.2-0<7.1.2-15
debian/imagemagick<8:6.9.11.60+dfsg-1.6+deb12u12
8:6.9.11.60+dfsg-1.6+deb12u12
debian/imagemagick<8:7.1.1.43+dfsg1-1+deb13u11
8:7.1.1.43+dfsg1-1+deb13u11
debian/imagemagick<8:7.1.2.15+dfsg1-1
8:7.1.2.15+dfsg1-1
nuget/magick.net-q16-anycpu<14.10.3
14.10.3
nuget/magick.net-q16-hdri-anycpu<14.10.3
14.10.3
nuget/magick.net-q16-hdri-openmp-arm64<14.10.3
14.10.3
nuget/magick.net-q16-hdri-openmp-x64<14.10.3
14.10.3
nuget/magick.net-q16-hdri-arm64<14.10.3
14.10.3
nuget/magick.net-q16-hdri-x64<14.10.3
14.10.3
nuget/magick.net-q16-hdri-x86<14.10.3
14.10.3
nuget/magick.net-q16-openmp-arm64<14.10.3
14.10.3
nuget/magick.net-q16-openmp-x64<14.10.3
14.10.3
nuget/magick.net-q16-openmp-x86<14.10.3
14.10.3
nuget/magick.net-q16-arm64<14.10.3
14.10.3
nuget/magick.net-q16-x64<14.10.3
14.10.3
nuget/magick.net-q16-x86<14.10.3
14.10.3
nuget/magick.net-q8-anycpu<14.10.3
14.10.3
nuget/magick.net-q8-openmp-arm64<14.10.3
14.10.3
nuget/magick.net-q8-openmp-x64<14.10.3
14.10.3
nuget/magick.net-q8-arm64<14.10.3
14.10.3
nuget/magick.net-q8-x64<14.10.3
14.10.3
nuget/magick.net-q8-x86<14.10.3
14.10.3
debian/imagemagick<=8:6.9.11.60+dfsg-1.6+deb12u11
8:6.9.11.60+dfsg-1.6+deb12u158:7.1.1.43+dfsg1-1+deb13u128:7.1.1.43+dfsg1-1+deb13u148:7.1.2.34+dfsg1-18:7.1.2.35+dfsg1-2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:6.9.11.60+dfsg-1.6+deb12u12
  2. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:7.1.1.43+dfsg1-1+deb13u11
  3. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:7.1.2.15+dfsg1-1
  4. Upgrade

    Upgrade nuget/Magick.NET-Q16-AnyCPU to a version that resolves this vulnerability.

    Fixed in 14.10.3
  5. Upgrade

    Upgrade nuget/Magick.NET-Q16-HDRI-AnyCPU to a version that resolves this vulnerability.

    Fixed in 14.10.3
  6. Upgrade

    Upgrade nuget/Magick.NET-Q16-HDRI-OpenMP-arm64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  7. Upgrade

    Upgrade nuget/Magick.NET-Q16-HDRI-OpenMP-x64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  8. Upgrade

    Upgrade nuget/Magick.NET-Q16-HDRI-arm64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  9. Upgrade

    Upgrade nuget/Magick.NET-Q16-HDRI-x64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  10. Upgrade

    Upgrade nuget/Magick.NET-Q16-HDRI-x86 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  11. Upgrade

    Upgrade nuget/Magick.NET-Q16-OpenMP-arm64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  12. Upgrade

    Upgrade nuget/Magick.NET-Q16-OpenMP-x64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  13. Upgrade

    Upgrade nuget/Magick.NET-Q16-OpenMP-x86 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  14. Upgrade

    Upgrade nuget/Magick.NET-Q16-arm64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  15. Upgrade

    Upgrade nuget/Magick.NET-Q16-x64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  16. Upgrade

    Upgrade nuget/Magick.NET-Q16-x86 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  17. Upgrade

    Upgrade nuget/Magick.NET-Q8-AnyCPU to a version that resolves this vulnerability.

    Fixed in 14.10.3
  18. Upgrade

    Upgrade nuget/Magick.NET-Q8-OpenMP-arm64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  19. Upgrade

    Upgrade nuget/Magick.NET-Q8-OpenMP-x64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  20. Upgrade

    Upgrade nuget/Magick.NET-Q8-arm64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  21. Upgrade

    Upgrade nuget/Magick.NET-Q8-x64 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  22. Upgrade

    Upgrade nuget/Magick.NET-Q8-x86 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  23. Upgrade

    Upgrade debian/imagemagick to a version that resolves this vulnerability.

    Fixed in 8:6.9.11.60+dfsg-1.6+deb12u15Fixed in 8:7.1.1.43+dfsg1-1+deb13u12Fixed in 8:7.1.1.43+dfsg1-1+deb13u14Fixed in 8:7.1.2.34+dfsg1-1Fixed in 8:7.1.2.35+dfsg1-2
  24. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 7.1.2-15
  25. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 6.9.13-40

Event History

Feb 25, 2026
Advisory Published
via OSV·07:12 PM
Data Sourced
via OSV·07:12 PM
DescriptionSeverityWeaknessAffected Software
Jun 21, 2026
CVE Published
via MITRE·01:26 PM
Data Sourced
via MITRE·01:26 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·02:16 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2026-56378?

The severity of CVE-2026-56378 is classified as low with a score of 3.7.

2

What are the implications of CVE-2026-56378?

CVE-2026-56378 may lead to denial of service and potential disclosure of adjacent heap memory during image decoding.

3

How do I fix CVE-2026-56378?

To fix CVE-2026-56378, upgrade to ImageMagick version 7.1.2-15 or 6.9.13-40 and later.

4

Who is affected by CVE-2026-56378?

CVE-2026-56378 affects users of ImageMagick versions prior to 7.1.2-15 or those using 6.x versions prior to 6.9.13-40.

5

What types of file can trigger CVE-2026-56378?

A crafted PCD file can trigger the vulnerability CVE-2026-56378 during the image decoding process.

Company

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Contact

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