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.
https://lists.debian.org/debian-lts-announce/2021/10/msg00028.html
https://github.com/opencv/opencv/pull/15382
https://github.com/OpenCV/opencv/issues/15287
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00025.html