PT-2026-55931 · Tonyc · Imager
Publicado
2026-07-06
·
Atualizado
2026-07-06
·
CVE-2026-13705
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Imager versions before 1.032 for Perl have a heap out-of-bounds read in the bundled Imager::File::SGI reader via a 16-bit RLE literal run in read rgb 16 rle.
read rgb 16 rle guards each literal run with if (count > data left), but count is a pixel count while every 16-bit sample consumes two bytes. The copy loop reads inp[0] * 256 + inp[1] and advances two bytes per pixel, so a run with data left / 2 < count <= data left passes the guard yet consumes 2 * count bytes and reads past the end of the buffer. The 8-bit path is unaffected because there one pixel is one byte.
Reading a crafted SGI image through Imager->read triggers the over-read before the parser rejects the malformed image, which can crash the process.
Out of bounds Read
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