Calling `curl_easy_pause()` within the event-based `CURLMOPT_SOCKETFUNCTION` callback triggers a use-after-free vulnerability, where libcurl attempts to store a flag using a dangling struct pointer immediately after that pointer's memory has been freed.
CVSS Details
- CVSS 3.1 Base Score: 7.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade curl | Jul 6, 2026 | Jul 3, 2026 |
| Amazon_linux_2023 | — | Upgrade curl-minimal-debuginfoUpgrade libcurlUpgrade libcurl-minimal-debuginfoUpgrade curl-debuginfoUpgrade libcurl-debuginfoUpgrade curlUpgrade curl-minimalUpgrade libcurl-minimalUpgrade curl-debugsourceUpgrade libcurl-devel | Sep 30, 2026 | Jul 3, 2026 |
| Ubuntu | — | Upgrade libcurl3-nss (Ubuntu Pro)Upgrade curlUpgrade libcurl3-nssUpgrade libcurl4-openssl-dev (Ubuntu Pro)Upgrade libcurl4-nss-devUpgrade libcurl3-gnutls (Ubuntu Pro)Upgrade libcurl4 (Ubuntu Pro)Upgrade libcurl4-nss-dev (Ubuntu Pro)Upgrade libcurl3t64-gnutlsUpgrade libcurl4-gnutls-devUpgrade libcurl3 (Ubuntu Pro)Upgrade libcurl4t64Upgrade libcurl4Upgrade libcurl4-openssl-devUpgrade libcurl3-gnutlsUpgrade libcurl4-gnutls-dev (Ubuntu Pro)Upgrade curl (Ubuntu Pro) | Jul 1, 2026 | Jun 30, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 10, 2026 | Jul 3, 2026 |
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