CVE-2020-28975: Scikit-Learn

High severity, CVSS 7.5. EPSS: 3.5% chance of exploitation in the next 30 days.

svm_predict_values in svm.cpp in Libsvm v324, as used in scikit-learn 0.23.2 and other products, allows attackers to cause a denial of service (segmentation fault) via a crafted model SVM (introduced via pickle, json, or any other model permanence standard) with a large value in the _n_support array. NOTE: the scikit-learn vendor's position is that the behavior can only occur if the library's API is violated by an application that changes a private attribute.

Affected products

• Scikit-Learn Scikit-Learn: from 0.23.2, before 1.0.1 (fixed in 1.0.1)

Published 2020-11-21. Last modified 2026-06-17.