جزئیات آسیب‌پذیری

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.

• https://github.com/tonycoz/imager/commit/f28de02770dfc26ffbdc32048970ed84babbf730.patch patch
• https://metacpan.org/release/TONYC/Imager-1.032/source/Changes release-notes
• http://www.openwall.com/lists/oss-security/2026/07/06/3