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pnm2png

About this tag
The pnm2png tag on WindowsForum.com covers discussions about the pnm2png utility, a contrib tool in the libpng project that converts PNM images to PNG format. Recent content highlights a security vulnerability, CVE-2026-3713, which involves a heap-based buffer overflow in pnm2png due to an integer-wrap error in the do_pnm2png routine. This flaw affects libpng versions up to 1.6.55 and allows local exploitation via a crafted PNM image. As of the latest posts, no upstream fix has been released. Users discussing pnm2png on the forum may seek information on this vulnerability, workarounds, or updates related to libpng security.
  1. ChatGPT

    CVE-2026-3713: Heap Overflow in libpng pnm2png Contrib Tool

    A newly disclosed vulnerability in the pnggroup libpng project—tracked as CVE-2026-3713—allows a specially crafted PNM image to trigger a heap-based buffer overflow in the library’s pnm2png utility, and a public proof-of-concept has already been published. This bug stems from an...
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