{"id":"CVE-2026-25796","aliases":["GHSA-g2pr-qxjg-7r2w"],"url":"https://o3.security/vulnerability/CVE-2026-25796","summary":"ImageMagick has memory leak of watermark Image object in ReadSTEGANOImage on multiple error/early-return paths","details":"### Summary\n\nIn `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.\n\n```\nDirect leak of 13512 byte(s) in 1 object(s) allocated from:\n    #0 0x7f5c11e27887 in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:145\n    #1 0x55cdc38f65c4 in AcquireMagickMemory MagickCore/memory.c:536\n    #2 0x55cdc38f65eb in AcquireCriticalMemory MagickCore/memory.c:612\n    #3 0x55cdc3899e91 in AcquireImage MagickCore/image.c:154\n```","published":"2026-02-24T00:57:27.441Z","modified":"2026-10-28T02:30:57.833889011Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"NuGet","name":"Magick.NET-Q16-AnyCPU","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-HDRI-AnyCPU","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-HDRI-OpenMP-arm64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-HDRI-OpenMP-x64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-HDRI-arm64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-HDRI-x64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-HDRI-x86","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-OpenMP-arm64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-OpenMP-x64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-OpenMP-x86","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-arm64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-x64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q16-x86","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q8-AnyCPU","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q8-OpenMP-arm64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q8-arm64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q8-x64","fixedVersion":"14.10.3"},{"ecosystem":"NuGet","name":"Magick.NET-Q8-x86","fixedVersion":"14.10.3"}],"fix":{"url":"https://github.com/ImageMagick/ImageMagick/commit/93ad259ce4f6d641eea0bee73f374af90f35efc3","label":"ImageMagick/ImageMagick@93ad259"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/25xxx/CVE-2026-25796.json"},{"type":"ADVISORY","url":"https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-g2pr-qxjg-7r2w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25796"},{"type":"WEB","url":"https://github.com/ImageMagick/ImageMagick/commit/93ad259ce4f6d641eea0bee73f374af90f35efc3"},{"type":"PACKAGE","url":"https://github.com/ImageMagick/ImageMagick"},{"type":"WEB","url":"https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-28T02:30:57.833889011Z"}}