{"cve":"CVE-2021-41496","nvd":{"published":"2021-12-17T20:15:08.517","modified":"2026-06-17T04:08:34.020","status":"Modified","description":"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)","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-120"],"references":["https://github.com/numpy/numpy/issues/19000","https://www.oracle.com/security-alerts/cpujul2022.html","https://github.com/numpy/numpy/issues/19000","https://www.oracle.com/security-alerts/cpujul2022.html"],"products":["numpy:numpy"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-41496","score":0.00396,"percentile":0.33803,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f7c7-j99h-c22f","url":"https://osv.dev/vulnerability/GHSA-f7c7-j99h-c22f","summary":"Buffer Copy without Checking Size of Input in NumPy","modified":"2023-11-08T04:06:59.274139Z","packages":[{"ecosystem":"PyPI","name":"numpy","purl":"pkg:pypi/numpy","ranges":["<1.19"],"fixed":["1.19"]}]},{"id":"PYSEC-2021-857","url":"https://osv.dev/vulnerability/PYSEC-2021-857","summary":"","modified":"2023-11-08T04:06:59.274139Z","packages":[{"ecosystem":"PyPI","name":"numpy","purl":"pkg:pypi/numpy","ranges":["<1.19.0"],"fixed":["1.19.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}