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Fencer Vulns
high 8.1

CVE-2022-42915 json

curl before 7.86.0 has a double free.

published 2022-10-29 4 y ago modified 2026-10-14 25 d ago also EUVD-2022-45972 , JLSEC-2026-398

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia CURL_jll 8.5.0+0
  • julia LibCURL_jll 7.87.0+0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • curl Debian 14, Debian 13, Debian 12 7.86.0-1

debian advisories DEBIAN-CVE-2022-42915

  • curl Ubuntu 22.04 LTS 7.81.0-1ubuntu1.6

ubuntu advisories UBUNTU-CVE-2022-42915

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • jbcs-httpd24-curl jboss core services 1 7.86.0-2.el7jbcs
  • jbcs-httpd24-curl jboss core services 1 7.86.0-2.el8jbcs
  • jbcs-httpd24-httpd jboss core services 1 2.4.51-37.el7jbcs
  • jbcs-httpd24-httpd jboss core services 1 2.4.51-37.el8jbcs
  • jbcs-httpd24-libcurl jboss core services 1 7.86.0-2.el7jbcs
  • jbcs-httpd24-libcurl jboss core services 1 7.86.0-2.el8jbcs
  • jbcs-httpd24-mod_ssl jboss core services 1 1:2.4.51-37.el7jbcs
  • jbcs-httpd24-mod_ssl jboss core services 1 1:2.4.51-37.el8jbcs

red hat advisories RHSA-2022:8840

  • curl openSUSE Tumbleweed 7.86.0-1.1

opensuse advisories openSUSE-SU-2024:12447-1

  • curl Alpine 3.15 7.80.0-r4
  • curl Alpine 3.16 7.83.1-r4
  • curl Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 7.86.0-r0

alpine advisories ALPINE-CVE-2022-42915

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • curl CBL-Mariner 2.0 7.86.0-1
  • tensorflow Azure Linux 3.0 2.16.1-1

azure linux advisories AZL-11368AZL-38185

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-42915 updated cvss 7.5

curl: HTTP proxy double-free

  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2022:8841
  • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-curl 7.86.0-2.el7jbcs, jbcs-httpd24-libcurl 7.86.0-2.el7jbcs Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-curl 7.86.0-2.el8jbcs, jbcs-httpd24-libcurl 7.86.0-2.el8jbcs
    fixed: vendor fix RHSA-2022:8840
  • Red Hat Enterprise Linux 6 curl, libcurl Red Hat Enterprise Linux 7 curl, libcurl Red Hat Enterprise Linux 8 curl, libcurl, libcurl-minimal Red Hat Enterprise Linux 9 curl, libcurl, curl-minimal, libcurl-minimal Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd 2.4.51-37.el7jbcs, jbcs-httpd24-mod_md 2.4.0-18.el7jbcs, jbcs-httpd24-apr-util 1.6.1-99.el7jbcs, jbcs-httpd24-mod_ssl 2.4.51-37.el7jbcs, jbcs-httpd24-nghttp2 1.43.0-11.el7jbcs, jbcs-httpd24-openssl 1.1.1k-13.el7jbcs, +22 more Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-httpd 2.4.51-37.el8jbcs, jbcs-httpd24-mod_md 2.4.0-18.el8jbcs, jbcs-httpd24-apr-util 1.6.1-99.el8jbcs, jbcs-httpd24-mod_ssl 2.4.51-37.el8jbcs, jbcs-httpd24-nghttp2 1.43.0-11.el8jbcs, jbcs-httpd24-openssl 1.1.1k-13.el8jbcs, +22 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated cvss 7.5

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
18 mo ago

Exploit prediction

3.65% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia CURL_jll
<8.5.0+0
8.5.0+0
julia LibCURL_jll
>=7.81.0+0, <7.87.0+0
7.87.0+0

Affected products

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.