CVE-2026-30931: ImageMagick has heap-based buffer overflow in UHDR encoder

March 12, 2026

A heap-based buffer overflow in the UHDR encoder can happen due to truncation of a value and it would allow an out of bounds write.

================================================================
==2158399==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x521000039500 at pc 0x562a4a42f968 bp 0x7ffcca4ed6c0 sp 0x7ffcca4ed6b0
WRITE of size 1 at 0x521000039500 thread T0

References

github.com/ImageMagick/ImageMagick
github.com/ImageMagick/ImageMagick/security/advisories/GHSA-h95r-c8c7-mrwx
github.com/advisories/GHSA-h95r-c8c7-mrwx
github.com/dlemstra/Magick.NET/releases/tag/14.10.4
nvd.nist.gov/vuln/detail/CVE-2026-30931

Code Behaviors & Features

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