# CVE-2024-6874: 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.

- Web page: https://patchblox.com/security/cve/CVE-2024-6874
- Priority: Routine
- CVSS: 4.3 (medium)
- EPSS: 0.0079
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 24, 2024

## Description

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

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | curl Debian 13.5 (trixie) | 8.9.0-1 | [DEBIAN-CVE-2024-6874](https://patchblox.com/security/data/fix/linux/debian-cve-2024-6874.md) | Jul 24, 2024 |
| Linux | curl Debian 14 | 8.9.0-1 | [DEBIAN-CVE-2024-6874](https://patchblox.com/security/data/fix/linux/debian-cve-2024-6874.md) | Jul 24, 2024 |
| Linux | curl opensuse-leap 15.6 | 8.14.1-150600.4.28.1 | [SUSE-SU-2025:03198-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03198-1.md) | Sep 12, 2025 |
| Linux | curl sles 15.6 | 8.14.1-150600.4.28.1 | [SUSE-SU-2025:03198-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03198-1.md) | Sep 12, 2025 |
| Linux | curl sles 15.7 | 8.14.1-150600.4.28.1 | [SUSE-SU-2025:03198-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-03198-1.md) | Sep 12, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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