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TI-2022-21332 Aliases CVE-2022-43552GHSA-6342-4x32-pp8v

Use after free in https://github.com/curl/curl

Priority LOW 32CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 12 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02714 86th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 6 advisoriesRed Hat: 12 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—https://github.com/curl/curlFixed in curl 7.87.0—No fix listedCNA
  • https://github.com/curl/curl Vendor— Affected Fixed in curl 7.87.0 Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*before 7.87.0VulnerableHaxx
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*13.0 to before 13.3VulnerableApple
cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6VulnerableSplunk
cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*9.1.0VulnerableSplunk
  • cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* Versions before 7.87.0 Vulnerable ·Haxx
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 13.0 to before 13.3 Vulnerable ·Apple
  • cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* Versions 8.2.0 to before 8.2.12; 9.0.0 to before 9.0.6 Vulnerable ·Splunk
  • cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* Versions 9.1.0 Vulnerable ·Splunk

Remediation

Red Hat 6 advisories

  • RHSA-2024:0428 Released 2024-01-25 · Red Hat rating Moderate
    curl security and bug fix update
    • Red Hat Enterprise Linux BaseOS EUS (v.8.6) curl-7.61.1-22.el8_6.12, libcurl-7.61.1-22.el8_6.12, libcurl-devel-7.61.1-22.el8_6.12 +1
  • RHSA-2023:7743 Released 2023-12-12 · Red Hat rating Low
    curl security update
    • Red Hat Enterprise Linux Client (v. 7) curl-7.29.0-59.el7_9.2, libcurl-7.29.0-59.el7_9.2
    • Red Hat Enterprise Linux Client Optional (v. 7) libcurl-devel-7.29.0-59.el7_9.2
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libcurl-devel-7.29.0-59.el7_9.2
    • Red Hat Enterprise Linux Server (v. 7) curl-7.29.0-59.el7_9.2, libcurl-7.29.0-59.el7_9.2, libcurl-7.29.0-59.el7_9.2.ppc +2
    • Red Hat Enterprise Linux Workstation (v. 7) curl-7.29.0-59.el7_9.2, libcurl-7.29.0-59.el7_9.2, libcurl-devel-7.29.0-59.el7_9.2
  • RHSA-2023:3354 Released 2023-06-05 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.51 SP2 security update
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr-util-1.6.1-101.el7jbcs, jbcs-httpd24-apr-util-devel-1.6.1-101.el7jbcs, jbcs-httpd24-apr-util-ldap-1.6.1-101.el7jbcs +23
    • Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-apr-util-1.6.1-101.el8jbcs, jbcs-httpd24-apr-util-devel-1.6.1-101.el8jbcs, jbcs-httpd24-apr-util-ldap-1.6.1-101.el8jbcs +23
Show 3 more Red Hat advisories
  • RHSA-2023:3355 Released 2023-06-05 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.51 SP2 security update
    • JBCS httpd 2.4.51.sp2
  • RHSA-2023:2963 Released 2023-05-16 · Red Hat rating Low
    curl security and bug fix update
    • Red Hat Enterprise Linux BaseOS (v. 8) curl-7.61.1-30.el8, libcurl-7.61.1-30.el8, libcurl-devel-7.61.1-30.el8 +1
  • RHSA-2023:2478 Released 2023-05-09 · Red Hat rating Low
    curl security update
    • Red Hat Enterprise Linux AppStream (v. 9) libcurl-devel-7.76.1-23.el9
    • Red Hat Enterprise Linux BaseOS (v. 9) curl-7.76.1-23.el9, curl-minimal-7.76.1-23.el9, libcurl-7.76.1-23.el9 +1

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
.NET Core 3.1 on Red Hat Enterprise LinuxAffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
JBCS httpd 2.4.51.sp2Fixed RHSA-2023:3355
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:2478
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2023:2963
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2023:2478
Red Hat Enterprise Linux BaseOS EUS (v.8.6)Fixed RHSA-2024:0428
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2023:7743
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2023:7743
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2023:7743
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2023:7743
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2023:7743
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2023:3354
Red Hat JBoss Core Services on RHEL 8Fixed RHSA-2023:3354
Not affected: 2 products
  • Red Hat JBoss Core Services on RHEL 7 Server
  • Red Hat JBoss Core Services on RHEL 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-43552
  2. 2026-10-03 Alias added: GHSA-6342-4x32-pp8v
  3. 2026-10-09 Fix available: RHSA-2023:3355 · Red Hat
  4. 2026-10-16 Fix available: JBCS httpd 2.4.51.sp2 · Red Hat

References

Exploit 1

Advisory 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences