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.
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Wed, 14 Oct 2026 19:30:00 +0000
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Status: PUBLISHED
Assigner: hackerone
Published: 2023-02-09T00:00:00.000Z
Updated: 2026-10-14T18:26:48.192Z
Reserved: 2022-10-20T00:00:00.000Z
Link: CVE-2022-43552
Updated: 2024-08-03T13:32:59.678Z
Status : Modified
Published: 2023-02-09T20:15:10.950
Modified: 2026-10-14T19:16:53.430
Link: CVE-2022-43552