CVE-2026-25970
Received Received - Intake
Signed Integer Overflow in ImageMagick SIXEL Decoder Causes DoS

Publication date: 2026-02-24

Last updated on: 2026-02-25

Assigner: GitHub, Inc.

Description
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, a signed integer overflow vulnerability in ImageMagick's SIXEL decoder allows an attacker to trigger memory corruption and denial of service when processing a maliciously crafted SIXEL image file. The vulnerability occurs during buffer reallocation operations where pointer arithmetic using signed 32-bit integers overflows. Versions 7.1.2-15 and 6.9.13-40 contain a patch.
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Meta Information
Published
2026-02-24
Last Modified
2026-02-25
Generated
2026-06-16
AI Q&A
2026-02-24
EPSS Evaluated
2026-06-14
NVD
CVE-2026-25970
EUVD
EUVD-2026-7429
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
imagemagick imagemagick to 6.9.13-40 (exc)
imagemagick imagemagick From 7.0.0-0 (inc) to 7.1.2-15 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-190 The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
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Detection Guidance

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Impact Analysis

This vulnerability can impact you by allowing an attacker to cause memory corruption and denial of service on systems using vulnerable versions of ImageMagick when processing malicious SIXEL image files.

The attack can be performed remotely over the network without requiring any privileges or user interaction.

The impact is limited to availability, meaning the system or service may crash or become unavailable, but there is no loss of confidentiality or integrity.

Executive Summary

[{'type': 'paragraph', 'content': "CVE-2026-25970 is a moderate severity vulnerability in ImageMagick's SIXEL decoder that affects versions prior to 7.1.2-15 and 6.9.13-40."}, {'type': 'paragraph', 'content': 'The vulnerability is caused by a signed integer overflow during buffer reallocation operations, where pointer arithmetic uses signed 32-bit integers that can overflow.'}, {'type': 'paragraph', 'content': 'This overflow can lead to memory corruption and denial of service when processing specially crafted malicious SIXEL image files.'}, {'type': 'paragraph', 'content': 'The underlying weakness is classified as CWE-190 (Integer Overflow or Wraparound), where calculations produce integer values that exceed the storage capacity, causing wraparound to small or negative numbers.'}, {'type': 'paragraph', 'content': 'The vulnerability has been patched in ImageMagick versions 7.1.2-15 and 6.9.13-40.'}] [1]

Compliance Impact

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Mitigation Strategies

To mitigate this vulnerability, you should update ImageMagick to a patched version.

  • Upgrade to ImageMagick version 7.1.2-15 or later.
  • Alternatively, upgrade to ImageMagick version 6.9.13-40 or later if using the 6.x branch.
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