ImageMagick has heap buffer overflow in WriteXWDImage due to CARD32 arithmetic overflow in bytes_per_line calculation

Description

=================================================================
==741961==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x5020000083dc at pc 0x56553b4c4245 bp 0x7ffd9d20fef0 sp 0x7ffd9d20fee0
WRITE of size 1 at 0x5020000083dc thread T0

References

• ImageMagick/ImageMagick security advisory · WEB
• nvd.nist.gov/vuln/detail/CVE-2026-30937 · ADVISORY
• ImageMagick/ImageMagick · PACKAGE

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