CVE-2026-25970
Signed Integer Overflow in ImageMagick SIXEL Decoder Causes DoS
Publication date: 2026-02-24
Last updated on: 2026-02-25
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 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. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
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.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
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.
Can you explain this vulnerability to me?
[{'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]
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know