CVE-2020-14422

Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this attacker can cause many dictionary entries to be created. This is fixed in: v3.5.10, v3.5.10rc1; v3.6.12; v3.7.9; v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1; v3.9.0, v3.9.0b4, v3.9.0b5, v3.9.0rc1, v3.9.0rc2.

CVSS 3.1

5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

13% chance of exploitation in the next 30 days; higher than 96% of CVEs (scores of 2026-10-25)

CWEs

CWE-330, CWE-682

Published

2020-06-18

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:fedora
• opensuse:leap
• oracle:enterprise_manager_ops_center
• python:python

References

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00003.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00032.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00041.html
• https://bugs.python.org/issue41004

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