CVE-2021-41495

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-12-17 · updated 2026-06-17
Weakness: CWE-476

Description

Null Pointer Dereference vulnerability exists in numpy.sort in NumPy &lt and 1.19 in the PyArray_DescrNew function due to missing return-value validation, which allows attackers to conduct DoS attacks by repetitively creating sort arrays. NOTE: While correct that validation is missing, an error can only occur due to an exhaustion of memory. If the user can exhaust memory, they are already privileged. Further, it should be practically impossible to construct an attack which can target the memory exhaustion to occur at exactly this place

Affected products

Numpy: through 1.19.0

References

https://github.com/numpy/numpy/issues/19038
https://www.oracle.com/security-alerts/cpujul2022.html
https://github.com/numpy/numpy/issues/19038
https://www.oracle.com/security-alerts/cpujul2022.html

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