# CVE-2025-4947: QUIC certificate check skip with wolfSSL

CVE-2025-4947 is fixed in curl on 1 platform, first by DEBIAN-CVE-2025-4947, released May 28, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-4947
- Priority: Routine
- CVSS: 6.5 (Moderate)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 28, 2025
- Weakness: Improper Certificate Validation
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-4947

## Description

libcurl accidentally skips the certificate verification for QUIC connections when connecting to a host specified as an IP address in the URL. Therefore, it does not detect impostors or man-in-the-middle attacks.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | curl Debian 13.5 (trixie) | 8.14.0-1 | [DEBIAN-CVE-2025-4947](https://patchblox.com/security/data/fix/linux/debian-cve-2025-4947.md) | May 28, 2025 |
| Linux | curl Debian 14 | 8.14.0-1 | [DEBIAN-CVE-2025-4947](https://patchblox.com/security/data/fix/linux/debian-cve-2025-4947.md) | May 28, 2025 |
| 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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