CVE-2021-41496: Numpy

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Buffer overflow in the array_from_pyobj function of fortranobject.c in NumPy < 1.19, which allows attackers to conduct a Denial of Service attacks by carefully constructing an array with negative values. NOTE: The vendor does not agree this is a vulnerability; the negative dimensions can only be created by an already privileged user (or internally)

Affected products

• Numpy Numpy: before 1.19.0 (fixed in 1.19.0)

Published 2021-12-17. Last modified 2026-06-17.