# CVE-2026-92388: libcurl3-gnutls: When an FTP wildcard `LIST` operation fails, libcurl omits the restoration path meant for successful listings, leavin... CVE-2026-92388 is fixed in 6 products on 1 platform, first by curl 7.58.0-2ubuntu3.24+esm15, released October 21, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-92388 - Priority: Routine - CVSS: n/a (Low) - EPSS: 0.0070 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Oct 13, 2026 ## Description When an FTP wildcard `LIST` operation fails, libcurl omits the restoration path meant for successful listings, leaving the write callback set to the internal listing parser and the write callback data pointing directly to the easy handle. Subsequent reuse of this handle triggers an immediate crash, and cloning it via `curl_easy_duphandle()` copies this corrupted state into the duplicate. If the original handle is subsequently freed, executing a transfer on the cloned handle causes a heap use-after-free read against the dangling handle reference; alternatively, reusing the original or cloned handle while changing only `CURLOPT_WRITEDATA` (and omitting `CURLOPT_WRITEFUNCTION`) results in type confusion, forcing the internal parser to interpret incoming server response bytes into memory at the application-supplied write data pointer. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | curl Ubuntu 18.04.6 LTS (bionic) | 7.58.0-2ubuntu3.24+esm15 | [curl 7.58.0-2ubuntu3.24+esm15](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-curl-7.58.0-2ubuntu3.24-esm15.md) | Oct 21, 2026 | | Linux | curl Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.25+esm10 | [curl 7.68.0-1ubuntu2.25+esm10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-curl-7.68.0-1ubuntu2.25-esm10.md) | Oct 21, 2026 | | Linux | curl Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.30 | [curl 7.81.0-1ubuntu1.30](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-curl-7.81.0-1ubuntu1.30.md) | Oct 21, 2026 | | Linux | curl Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.16 | [curl 8.5.0-2ubuntu10.16](https://patchblox.com/security/data/fix/linux/ubuntu-noble-curl-8.5.0-2ubuntu10.16.md) | Oct 21, 2026 | | Linux | curl Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2.8 | [curl 8.18.0-1ubuntu2.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-curl-8.18.0-1ubuntu2.8.md) | Nov 7, 2026 | | Linux | curl sles 15.6 | 8.22.0-150600.4.58.1 | [SUSE-SU-2026:5069-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5069-1.md) | Nov 7, 2026 | | Linux | curl sles 15.7 | 8.22.0-150700.7.33.1 | [SUSE-SU-2026:5068-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5068-1.md) | Nov 7, 2026 | | Linux | libcurl3-gnutls Ubuntu 18.04.6 LTS (bionic) | 7.58.0-2ubuntu3.24+esm15 | [libcurl3-gnutls 7.58.0-2ubuntu3.24+esm15](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libcurl3-gnutls-7.58.0-2ubuntu3.24-esm15.md) | Oct 21, 2026 | | Linux | libcurl3-gnutls Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.25+esm10 | [libcurl3-gnutls 7.68.0-1ubuntu2.25+esm10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libcurl3-gnutls-7.68.0-1ubuntu2.25-esm10.md) | Oct 21, 2026 | | Linux | libcurl3-gnutls Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.30 | [libcurl3-gnutls 7.81.0-1ubuntu1.30](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libcurl3-gnutls-7.81.0-1ubuntu1.30.md) | Oct 21, 2026 | | Linux | libcurl3-nss Ubuntu 18.04.6 LTS (bionic) | 7.58.0-2ubuntu3.24+esm15 | [libcurl3-nss 7.58.0-2ubuntu3.24+esm15](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libcurl3-nss-7.58.0-2ubuntu3.24-esm15.md) | Oct 21, 2026 | | Linux | libcurl3-nss Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.25+esm10 | [libcurl3-nss 7.68.0-1ubuntu2.25+esm10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libcurl3-nss-7.68.0-1ubuntu2.25-esm10.md) | Oct 21, 2026 | | Linux | libcurl3-nss Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.30 | [libcurl3-nss 7.81.0-1ubuntu1.30](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libcurl3-nss-7.81.0-1ubuntu1.30.md) | Oct 21, 2026 | | Linux | libcurl3t64-gnutls Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.16 | [libcurl3t64-gnutls 8.5.0-2ubuntu10.16](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libcurl3t64-gnutls-8.5.0-2ubuntu10.16.md) | Oct 21, 2026 | | Linux | libcurl3t64-gnutls Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2.8 | [libcurl3t64-gnutls 8.18.0-1ubuntu2.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libcurl3t64-gnutls-8.18.0-1ubuntu2.8.md) | Nov 7, 2026 | | Linux | libcurl4 Ubuntu 18.04.6 LTS (bionic) | 7.58.0-2ubuntu3.24+esm15 | [libcurl4 7.58.0-2ubuntu3.24+esm15](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libcurl4-7.58.0-2ubuntu3.24-esm15.md) | Oct 21, 2026 | | Linux | libcurl4 Ubuntu 20.04 LTS (focal) | 7.68.0-1ubuntu2.25+esm10 | [libcurl4 7.68.0-1ubuntu2.25+esm10](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libcurl4-7.68.0-1ubuntu2.25-esm10.md) | Oct 21, 2026 | | Linux | libcurl4 Ubuntu 22.04.1 LTS (jammy) | 7.81.0-1ubuntu1.30 | [libcurl4 7.81.0-1ubuntu1.30](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libcurl4-7.81.0-1ubuntu1.30.md) | Oct 21, 2026 | | Linux | libcurl4t64 Ubuntu 24.04.5 LTS (noble) | 8.5.0-2ubuntu10.16 | [libcurl4t64 8.5.0-2ubuntu10.16](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libcurl4t64-8.5.0-2ubuntu10.16.md) | Oct 21, 2026 | | Linux | libcurl4t64 Ubuntu 26.04.1 LTS (resolute) | 8.18.0-1ubuntu2.8 | [libcurl4t64 8.18.0-1ubuntu2.8](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libcurl4t64-8.18.0-1ubuntu2.8.md) | Nov 7, 2026 | --- Data as of 2026-11-09T13:31:49Z UTC. 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