curl: libcurl's URL API function [curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode conversions,...
CVE-2024-6874 is fixed in curl on 1 platform, first by DEBIAN-CVE-2024-6874, released July 24, 2024. It is not reported as exploited. Patch Radar priority: Routine.
libcurl's URL API function [curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode conversions, to and from IDN. Asking to convert a name that is exactly 256 bytes, libcurl ends up reading outside of a stack based buffer when built to use the *macidn* IDN backend. The conversion function then fills up the provided buffer exactly - but does not null terminate the string. This flaw can lead to stack contents accidently getting returned as part of the converted string.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| curl · Debian 13.5 (trixie) | 8.9.0-1 | DEBIAN-CVE-2024-6874 | Jul 24, 2024 |
| curl · Debian 14 | 8.9.0-1 | DEBIAN-CVE-2024-6874 | Jul 24, 2024 |
| curl · opensuse-leap 15.6 | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 | Sep 12, 2025 |
| curl · sles 15.6 | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 | Sep 12, 2025 |
| curl · sles 15.7 | 8.14.1-150600.4.28.1 | SUSE-SU-2025:03198-1 | Sep 12, 2025 |
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