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

Description

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

References

• ImageMagick/ImageMagick security advisory · WEB
• nvd.nist.gov/vuln/detail/CVE-2026-25796 · ADVISORY
• ImageMagick/ImageMagick commit 93ad259 · WEB
• ImageMagick/ImageMagick · PACKAGE
• dlemstra/Magick.NET release 14.10.3 · WEB

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