GHSA-6hjr-v6g4-3fm8 is a high-severity (CVSS 7.5) Out-of-bounds Read vulnerability in Magick.NET-Q16-AnyCPU. O3 Security confirms whether GHSA-6hjr-v6g4-3fm8 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
ImageMagick is vulnerable to an integer Overflow in TIM decoder leading to out of bounds read (32-bit only)
Real-World Exposure
Magick.NET-Q16-AnyCPU.NETMagick.NET-Q16-HDRI-AnyCPU.NETMagick.NET-Q16-HDRI-x86.NETMagick.NET-Q16-x86.NETMagick.NET-Q8-AnyCPU.NETMagick.NET-Q8-x86Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.
Description
Summary
The TIM (PSX TIM) image parser in ImageMagick contains a critical integer overflow vulnerability in the 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.
Vulnerable Code
File: coders/tim.c
width=ReadBlobLSBShort(image);
height=ReadBlobLSBShort(image);
image_size=2*width*height; // Line 234 - NO OVERFLOW CHECK!
Impact
This vulnerability can lead to Arbitrary Memory Disclosure due to an out of bounds read on 32-bit systems.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| .NETNuGet | Magick.NET-Q16-AnyCPU | all versions | 14.10.0 |
| .NETNuGet | Magick.NET-Q16-HDRI-AnyCPU | all versions | 14.10.0 |
| .NETNuGet | Magick.NET-Q16-HDRI-x86 | all versions | 14.10.0 |
| .NETNuGet | Magick.NET-Q16-x86 | all versions | 14.10.0 |
| .NETNuGet | Magick.NET-Q8-AnyCPU | all versions | 14.10.0 |
| .NETNuGet | Magick.NET-Q8-x86 | all versions | 14.10.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Magick.NET-Q16-AnyCPU. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update Magick.NET-Q16-AnyCPU to 14.10.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6hjr-v6g4-3fm8 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-6hjr-v6g4-3fm8 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-6hjr-v6g4-3fm8. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-6hjr-v6g4-3fm8 in your dependencies?
O3 detects GHSA-6hjr-v6g4-3fm8 across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.