CVE-2026-25796: ImageMagick has memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths
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:
References
- github.com/ImageMagick/ImageMagick
- github.com/ImageMagick/ImageMagick/commit/93ad259ce4f6d641eea0bee73f374af90f35efc3
- github.com/ImageMagick/ImageMagick/security/advisories/GHSA-g2pr-qxjg-7r2w
- github.com/advisories/GHSA-g2pr-qxjg-7r2w
- github.com/dlemstra/Magick.NET/releases/tag/14.10.3
- nvd.nist.gov/vuln/detail/CVE-2026-25796
Code Behaviors & Features
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