An issue was discovered in OpenCV 4.1.0. There is a divide-by-zero error in cv::HOGDescriptor::getDescriptorSize in modules/objdetect/src/hog.cpp.
Created opencv tracking bugs for this issue:
Affects: fedora-all [bug 1764732]
This flaw affects the implementation of Histogram of Oriented Gradients (HOG) Descriptor, an algorithm used internally by OpenCV to detect objects in digital images.
More specifically, method HOGDescriptor::getDescriptorSize() computes the remainder of the division of variables blockSize.width by cellSize.width, without ensuring that the value of cellSize.width is not zero. As a result, the code ends up dividing a value by zero, leading to a floating point exception that ultimately results in a crash of the application.
It is worth noting that those variables are set in method HOGDescriptor::read() when a HOGDescriptor object is created by loading its properties from a local file.
Avoid using the Histogram of Oriented Gradients (HOG) Descriptor algorithm to detect objects in digital images. Alternatively, ensure HOGDescriptor objects are not created from external untrusted files.
Fixed in 3.4.8 and later Current version in Fedora 31 3.4.10.