CVE-2022-45061: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 2.7% chance of exploitation in the next 30 days.

An issue was discovered in Python before 3.11.1. An unnecessary quadratic algorithm exists in one path when processing some inputs to the IDNA (RFC 3490) decoder, such that a crafted, unreasonably long name being presented to the decoder could lead to a CPU denial of service. Hostnames are often supplied by remote servers that could be controlled by a malicious actor; in such a scenario, they could trigger excessive CPU consumption on the client attempting to make use of an attacker-supplied supposed hostname. For example, the attack payload could be placed in the Location header of an HTTP response with status code 302. A fix is planned in 3.11.1, 3.10.9, 3.9.16, 3.8.16, and 3.7.16.

Affected products

• Fedoraproject Fedora: version 35 only; version 36 only; version 37 only
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Bootstrap OS: affected versions not specified
• Netapp E-Series Performance Analyzer: affected versions not specified
• Netapp Element Software: affected versions not specified
• Netapp Hci: affected versions not specified
• Netapp Management Services For Element Software: affected versions not specified
• Netapp Ontap Select Deploy Administration Utility: affected versions not specified
• Python Python: up to and including 3.7.15; from 3.8.0, up to and including 3.8.15; from 3.9.0, up to and including 3.9.15; from 3.10.0, up to and including 3.10.8; version 3.11.0 only

Published 2022-11-09. Last modified 2026-06-17.