CVE-2026-25898: Imagemagick Has Global Buffer Overflow (OOB Read) via Negative Pixel Index in UIL and XPM Writer

Published Feb 24, 2026
·
Updated

ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 7.1.2-15 and 6.9.13-40, the UIL and XPM image encoder do not validate the pixel index value returned by GetPixelIndex() before using it as an array subscript. In HDRI builds, Quantum is a floating-point type, so pixel index values can be negative. An attacker can craft an image with negative pixel index values to trigger a global buffer overflow read during conversion, leading to information disclosure or a process crash. Versions 7.1.2-15 and 6.9.13-40 contain a patch.

Other sources

The UIL and XPM image encoder do not validate the pixel index value returned by GetPixelIndex() before using it as an array subscript. In HDRI builds, Quantum is a floating-point type, so pixel index values can be negative. An attacker can craft an image with negative pixel index values to trigger a global buffer overflow read during conversion, leading to information disclosure or a process crash.

READ of size 1 at 0x55a8823a776e thread T0 #0 0x55a880d01e85 in WriteUILImage coders/uil.c:355

READ of size 1 at 0x55fa1c04c66e thread T0 #0 0x55fa1a9ee415 in WriteXPMImage coders/xpm.c:1135

— GitHub

Affected Software

24 affected componentsFixes available
ImageMagick ImageMagick<7.1.2-15, <6.9.13-40
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-x64<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-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<6.9.13-40
ImageMagick ImageMagick>=7.0.0-0<7.1.2-15
alpine/imagemagick>=7.0.0-0<7.1.2.15-r0
7.1.2.15-r0
alpine/imagemagick>=7.0.0-0<7.1.2.15-r0
7.1.2.15-r0
alpine/imagemagick>=7.0.0-0<7.1.2.15-r0
7.1.2.15-r0
debian/imagemagick
8:6.9.11.60+dfsg-1.6+deb12u118:6.9.11.60+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 nuget/Magick.NET-Q8-x86 to a version that resolves this vulnerability.

    Fixed in 14.10.3
  2. Upgrade

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

    Fixed in 14.10.3
  3. Upgrade

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

    Fixed in 14.10.3
  4. Upgrade

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

    Fixed in 14.10.3
  5. Upgrade

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

    Fixed in 14.10.3
  6. Upgrade

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

    Fixed in 14.10.3
  7. Upgrade

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

    Fixed in 14.10.3
  8. Upgrade

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

    Fixed in 14.10.3
  9. Upgrade

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

    Fixed in 14.10.3
  10. Upgrade

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

    Fixed in 14.10.3
  13. Upgrade

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

    Fixed in 14.10.3
  14. Upgrade

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

    Fixed in 14.10.3
  15. Upgrade

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

    Fixed in 14.10.3
  16. Upgrade

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

    Fixed in 14.10.3
  17. Upgrade

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

    Fixed in 14.10.3
  18. Upgrade

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

    Fixed in 7.1.2.15-r0
  19. Upgrade

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

    Fixed in 8:6.9.11.60+dfsg-1.6+deb12u11Fixed 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
  20. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 7.1.2-15
  21. Upgrade

    Upgrade ImageMagick to a version that resolves this vulnerability.

    Fixed in 6.9.13-40

Event History

Feb 24, 2026
CVE Published
via MITRE·01:18 AM
Data Sourced
via MITRE·01:18 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·02:16 AM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·02:16 AM
DescriptionSeverityAffected Software
Advisory Published
via GitHub·03:39 PM
Data Sourced
via GitHub·03:39 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-2026-25898?

CVE-2026-25898 has a high severity due to its potential for a global buffer overflow leading to application crashes or arbitrary code execution.

2

How do I fix CVE-2026-25898?

To fix CVE-2026-25898, upgrade ImageMagick to version 7.1.2-15 or 6.9.13-40 and later.

3

What software is affected by CVE-2026-25898?

CVE-2026-25898 affects ImageMagick versions prior to 7.1.2-15 and 6.9.13-40.

4

Can CVE-2026-25898 lead to data leakage?

Yes, CVE-2026-25898 can potentially lead to data leakage due to the buffer overflow vulnerabilities.

5

What types of attacks can exploit CVE-2026-25898?

Attackers can exploit CVE-2026-25898 through crafted image files that trigger the buffer overflow in UIL and XPM encoders.

Company

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