CVE-2022-42915: Apple macOS

High severity, CVSS 8.1. EPSS: 2.9% chance of exploitation in the next 30 days.

curl before 7.86.0 has a double free. If curl is told to use an HTTP proxy for a transfer with a non-HTTP(S) URL, it sets up the connection to the remote server by issuing a CONNECT request to the proxy, and then tunnels the rest of the protocol through. An HTTP proxy might refuse this request (HTTP proxies often only allow outgoing connections to specific port numbers, like 443 for HTTPS) and instead return a non-200 status code to the client. Due to flaws in the error/cleanup handling, this could trigger a double free in curl if one of the following schemes were used in the URL for the transfer: dict, gopher, gophers, ldap, ldaps, rtmp, rtmps, or telnet. The earliest affected version is 7.77.0.

Affected products

• Apple macOS: from 12.0.0, before 12.6.3 (fixed in 12.6.3); from 13.0, before 13.2 (fixed in 13.2)
• Fedoraproject Fedora: version 35 only; version 36 only; version 37 only
• Haxx Curl: from 7.77.0, before 7.86.0 (fixed in 7.86.0)
• Netapp h300s Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Netapp Ontap 9: affected versions not specified
• Splunk Universal Forwarder: from 8.2.0, before 8.2.12 (fixed in 8.2.12); from 9.0.0, before 9.0.6 (fixed in 9.0.6); version 9.1.0 only

Published 2022-10-29. Last modified 2026-06-17.