CVE-2026-40493: Image Codec Bpp From Raw Channels Depth
Bytes-per-pixel is computed from raw header fields ($STATE->channels * $STATE->depth) instead of from the resolved pixel format (e.g. sail_bits_per_pixel(image->pixel_format)). When the row/scan-line buffer is allocated based on the resolved pixel_format, this raw-header-derived stride can exceed the allocated bytes-per-pixel, causing heap buffer overflows o
Cgreprules fetch cve-2026-40493-image-codec-bpp-from-raw-channels-depth --engine opengrepDescription
Bytes-per-pixel is computed from raw header fields ($STATE->channels * $STATE->depth) instead of from the resolved pixel format (e.g. sail_bits_per_pixel(image->pixel_format)). When the row/scan-line buffer is allocated based on the resolved pixel_format, this raw-header-derived stride can exceed the allocated bytes-per-pixel, causing heap buffer overflows o
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