CVE-2022-42915
curl before 7.86.0 has a double free.
Published Oct 29, 2022 · updated Oct 14, 2026 · haxx curl
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.
Timeline
Detection, updates, and resolution for this record.
Oct 29, 2022 · NIST NVD
Detected
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 ins
Oct 14, 2026 · NIST NVD
Updated
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 ins
Affected
- cpe apple/macosversion unspecified
- cpe fedoraproject/fedora35
- cpe fedoraproject/fedora36
- cpe fedoraproject/fedora37
- cpe haxx/curlversion unspecified
- cpe netapp/h300s firmwareversion unspecified
- cpe netapp/h410s firmwareversion unspecified
- cpe netapp/h500s firmwareversion unspecified
- cpe netapp/h700s firmwareversion unspecified
- cpe netapp/ontap 9version unspecified
- cpe splunk/universal forwarderversion unspecified
Sources
- CVE.orgCVE-2022-42915
Official CVE identifier
cve.org - FIRST EPSSCVE-2022-42915
30-day exploitation probability 2.9%
first.org - NIST NVDCVE-2022-42915
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 refus
nvd.nist.gov