CVE-2022-43552
A use after free vulnerability exists in curl <7.87.0.
Published Feb 9, 2023 · updated Oct 14, 2026 · haxx curl
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.
Timeline
Detection, updates, and resolution for this record.
Feb 9, 2023 · NIST NVD
Detected
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.
Oct 14, 2026 · NIST NVD
Updated
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.
Affected
- cpe apple/macosversion unspecified
- cpe haxx/curlversion unspecified
- cpe splunk/universal forwarderversion unspecified
- cpe splunk/universal forwarder9.1.0
Sources
- CVE.orgCVE-2022-43552
Official CVE identifier
cve.org - FIRST EPSSCVE-2022-43552
30-day exploitation probability 2.5%
first.org - NIST NVDCVE-2022-43552
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 wo
nvd.nist.gov