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During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade curl | Oct 20, 2026 | Oct 14, 2026 |
| Debian | — | Upgrade curl | Oct 20, 2026 | Oct 14, 2026 |
| Ubuntu | — | Upgrade libcurl4t64Upgrade curlUpgrade libcurl3t64-gnutls | Oct 14, 2026 | Oct 14, 2026 |
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