CVE-2026-25637: ImageMagick: Possible memory leak in ASHLAR encoder

Published Feb 24, 2026
·
Updated

A memory leak in the ASHLAR image writer allows an attacker to exhaust process memory by providing a crafted image that results in small objects that are allocated but never freed.

==880062== Memcheck, a memory error detector ==880062== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==880062== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info ==880062== ==880062== ==880062== HEAP SUMMARY: ==880062== in use at exit: 386,826 bytes in 696 blocks ==880062== total heap usage: 30,523 allocs, 29,827 frees, 21,803,756 bytes allocated ==880062== ==880062== LEAK SUMMARY: ==880062== definitely lost: 3,408 bytes in 3 blocks ==880062== indirectly lost: 88,885 bytes in 30 blocks ==880062== possibly lost: 140,944 bytes in 383 blocks ==880062== still reachable: 151,573 bytes in 259 blocks ==880062== suppressed: 0 bytes in 0 blocks ==880062== Reachable blocks (those to which a pointer was found) are not shown. ==880062== To see them, rerun with: --leak-check=full --show-leak-kinds=all ==880062== ==880062== For lists of detected and suppressed errors, rerun with: -s ==880062== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)

Other sources

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to version 7.1.2-15, a memory leak in the ASHLAR image writer allows an attacker to exhaust process memory by providing a crafted image that results in small objects that are allocated but never freed. Version 7.1.2-15 contains a patch.

— MITRE

Affected Software

20 affected componentsFixes available
ImageMagick ImageMagick<7.1.2-15
nuget/Magick.NET-Q8-x86<14.10.3
14.10.3
nuget/Magick.NET-Q8-arm64<14.10.3
14.10.3
nuget/Magick.NET-Q8-OpenMP-x64<14.10.3
14.10.3
nuget/Magick.NET-Q8-OpenMP-arm64<14.10.3
14.10.3
nuget/Magick.NET-Q8-AnyCPU<14.10.3
14.10.3
nuget/Magick.NET-Q16-x86<14.10.3
14.10.3
nuget/Magick.NET-Q16-arm64<14.10.3
14.10.3
nuget/Magick.NET-Q16-OpenMP-x86<14.10.3
14.10.3
nuget/Magick.NET-Q16-OpenMP-x64<14.10.3
14.10.3
nuget/Magick.NET-Q16-OpenMP-arm64<14.10.3
14.10.3
nuget/Magick.NET-Q16-HDRI-x86<14.10.3
14.10.3
nuget/Magick.NET-Q16-HDRI-x64<14.10.3
14.10.3
nuget/Magick.NET-Q16-HDRI-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-OpenMP-arm64<14.10.3
14.10.3
nuget/Magick.NET-Q16-HDRI-AnyCPU<14.10.3
14.10.3
nuget/Magick.NET-Q16-AnyCPU<14.10.3
14.10.3
ImageMagick ImageMagick<7.1.2-15
Dlemstra Magick.net<14.10.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 14.10.3
  2. Upgrade

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

    Fixed in 14.10.3
  3. Upgrade

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

    Fixed in 14.10.3
  4. Upgrade

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

    Fixed in 14.10.3
  5. Upgrade

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

    Fixed in 14.10.3
  6. Upgrade

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

    Fixed in 14.10.3
  7. Upgrade

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

    Fixed in 14.10.3
  8. Upgrade

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

    Fixed in 14.10.3
  9. Upgrade

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

    Fixed in 14.10.3
  10. Upgrade

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

    Fixed in 14.10.3
  11. Upgrade

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

    Fixed in 14.10.3
  12. Upgrade

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

    Fixed in 14.10.3
  13. Upgrade

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

    Fixed in 14.10.3
  14. Upgrade

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

    Fixed in 14.10.3
  15. Upgrade

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

    Fixed in 14.10.3
  16. Upgrade

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

    Fixed in 14.10.3
  17. Upgrade

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

    Fixed in 14.10.3
  18. Upgrade

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

    Fixed in 14.10.3
  19. Upgrade

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

    Fixed in 14.10.3
  20. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 7.1.2-15

Event History

Feb 24, 2026
CVE Published
via MITRE·12:48 AM
Data Sourced
via MITRE·12:48 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·01:16 AM
RemedyDescriptionSeverityWeaknessAffected Software
Advisory Published
via GitHub·03:30 PM
Data Sourced
via GitHub·03:30 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2026-25637?

CVE-2026-25637 has a severity level that poses a risk of memory exhaustion due to a memory leak in the ASHLAR encoder.

2

How do I fix CVE-2026-25637?

To fix CVE-2026-25637, upgrade to ImageMagick version 7.1.2-15 or later.

3

Which versions of ImageMagick are affected by CVE-2026-25637?

CVE-2026-25637 affects versions of ImageMagick prior to 7.1.2-15.

4

What type of vulnerability is CVE-2026-25637?

CVE-2026-25637 is classified as a memory leak vulnerability.

5

Can CVE-2026-25637 be exploited remotely?

Yes, CVE-2026-25637 can potentially be exploited remotely through crafted image files.

Company

Resources

Contact

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