CVE-2026-25897
Received Received - Intake
Integer Overflow in ImageMagick Sun Decoder Causes Heap Corruption

Publication date: 2026-02-24

Last updated on: 2026-02-24

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, an Integer Overflow vulnerability exists in the sun decoder. On 32-bit systems/builds, a carefully crafted image can lead to an out of bounds heap write. 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
2026-02-24
Generated
2026-06-16
AI Q&A
2026-02-24
EPSS Evaluated
2026-06-15
NVD
CVE-2026-25897
EUVD
EUVD-2026-7440
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.
CWE-122 A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Attack-Flow Graph
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Executive Summary

CVE-2026-25897 is a moderate severity vulnerability in 32-bit builds of ImageMagick versions prior to 7.1.2-15 and 6.9.13-40. It involves an integer overflow in the sun decoder component, which can cause a heap buffer overflow leading to an out-of-bounds write when processing a specially crafted image file.

Impact Analysis

This vulnerability can be exploited remotely without requiring privileges or user interaction. It allows an attacker to corrupt heap memory, causing a denial of service by impacting the availability of the affected system.

Compliance Impact

I don't know

Detection Guidance

This vulnerability was identified through AddressSanitizer, which detected a heap-buffer-overflow error during a write operation. Therefore, using AddressSanitizer or similar memory error detection tools when processing images with ImageMagick can help detect this issue.

Since the vulnerability is triggered by processing specially crafted image files, monitoring or analyzing ImageMagick logs for crashes or abnormal behavior when handling image files may indicate exploitation attempts.

No specific commands are provided in the resources, but running ImageMagick commands on suspicious or untrusted images under AddressSanitizer instrumentation could help detect the vulnerability.

Mitigation Strategies

The immediate mitigation step is to upgrade ImageMagick to versions 7.1.2-15 or 6.9.13-40 or later, as these versions contain the patch that fixes the integer overflow vulnerability in the sun decoder.

Additionally, avoid processing untrusted or specially crafted image files on vulnerable 32-bit builds of ImageMagick to reduce the risk of exploitation.

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