mbedtls: Mbed TLS before 2.28.10 and 3.x before 3.6.3, on the client side, accepts servers that have trusted certificates for...
CVE-2025-27809 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2025-27809, released March 25, 2025. It is not reported as exploited. Patch Radar priority: Routine.
Mbed TLS before 2.28.10 and 3.x before 3.6.3, on the client side, accepts servers that have trusted certificates for arbitrary hostnames unless the TLS client application calls mbedtls_ssl_set_hostname.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| mbedtls · Debian 13.5 (trixie) | 3.6.3-1 | DEBIAN-CVE-2025-27809 | Mar 25, 2025 |
| mbedtls · Debian 14 | 3.6.3-1 | DEBIAN-CVE-2025-27809 | Mar 25, 2025 |
| mbedtls · opensuse-leap 16.0 | 3.6.6-bp160.1.1 | OPENSUSE-SU-2026:21144-1 | Jun 22, 2026 |
| mbedtls-2 · opensuse-leap 16.0 | 2.28.10-bp160.1.1 | OPENSUSE-SU-2026:21145-1 | Jun 22, 2026 |
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