psf_is_pipe (SF_PRIVATE *psf)
{	struct stat statbuf ;

	if (psf->virtual_io)
		return SF_FALSE ;

	if (fstat (psf->file.filedes, &statbuf) == -1)
	{	psf_log_syserr (psf, errno) ;
		/* Default to maximum safety. */
		return SF_TRUE ;
		} ;

	if (S_ISFIFO (statbuf.st_mode) || S_ISSOCK (statbuf.st_mode))
		return SF_TRUE ;

	return SF_FALSE ;
} /* psf_is_pipe */

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.