NetSight
IP …
medium5.3

CVE-2026-25796

ImageMagick has memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths

Impact

### Summary In `ReadSTEGANOImage()` (`coders/stegano.c`), the `watermark` Image object is not freed on three early-return paths, resulting in a definite memory leak (~13.5KB+ per invocation) that can be exploited for denial of service. ``` Direct leak of 13512 byte(s) in 1 object(s) allocated from: #0 0x7f5c11e27887 in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145 #1 0x55cdc38f65c4 in AcquireMagickMemory MagickCore/memory.c:536 #2 0x55cdc38f65eb in AcquireCriticalMemory MagickCore/memory.c:612 #3 0x55cdc3899e91 in AcquireImage MagickCore/image.c:154 ```

Affected packages

EcosystemPackageAffectedFixed in
nugetMagick.NET-Q16-AnyCPU< 14.10.314.10.3
nugetMagick.NET-Q16-HDRI-AnyCPU< 14.10.314.10.3
nugetMagick.NET-Q16-HDRI-OpenMP-arm64< 14.10.314.10.3
nugetMagick.NET-Q16-HDRI-OpenMP-x64< 14.10.314.10.3
nugetMagick.NET-Q16-HDRI-arm64< 14.10.314.10.3
nugetMagick.NET-Q16-HDRI-x64< 14.10.314.10.3
nugetMagick.NET-Q16-HDRI-x86< 14.10.314.10.3
nugetMagick.NET-Q16-OpenMP-arm64< 14.10.314.10.3
nugetMagick.NET-Q16-OpenMP-x64< 14.10.314.10.3
nugetMagick.NET-Q16-OpenMP-x86< 14.10.314.10.3
nugetMagick.NET-Q16-arm64< 14.10.314.10.3
nugetMagick.NET-Q16-x64< 14.10.314.10.3
nugetMagick.NET-Q16-x86< 14.10.314.10.3
nugetMagick.NET-Q8-AnyCPU< 14.10.314.10.3
nugetMagick.NET-Q8-OpenMP-arm64< 14.10.314.10.3
nugetMagick.NET-Q8-arm64< 14.10.314.10.3
nugetMagick.NET-Q8-x64< 14.10.314.10.3
nugetMagick.NET-Q8-x86< 14.10.314.10.3

Affected products

VendorProductAffected versions
ImagemagickImagemagick
before 6.9.13-40
from 7.0.0-0 before 7.1.2-15

Weakness classification

CWE-401

References