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CVE-2026-13705                                       CPAN Security Group
========================================================================

        CVE ID:  CVE-2026-13705
  Distribution:  Imager
      Versions:  before 1.032

      MetaCPAN:  https://metacpan.org/dist/Imager
      VCS Repo:  https://github.com/tonycoz/imager

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

Description
-----------
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.

Problem types
-------------
- CWE-125 Out-of-bounds Read

Solutions
---------
Upgrade to Imager 1.032 or later.

References
----------
https://github.com/tonycoz/imager/commit/f28de02770dfc26ffbdc32048970ed84babbf730.patch
https://metacpan.org/release/TONYC/Imager-1.032/source/Changes

Timeline
--------
- 2026-07-01: Version 1.032 released with fix.