CVE-2025-27809 Affecting mbedtls package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2404-MBEDTLS-9512966
- published9 Oct 2025
- disclosed25 Mar 2025
Introduced: 25 Mar 2025
CVE-2025-27809 (opens in a new tab)How to fix?
There is no fixed version for Ubuntu:24.04 mbedtls.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mbedtls package and not the mbedtls package as distributed by Ubuntu.
See How to fix? for Ubuntu:24.04 relevant fixed versions and status.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2025-27809
- https://github.com/Mbed-TLS/mbedtls/releases
- https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2025-03-1/
- https://github.com/Mbed-TLS/mbedtls/issues/466
- https://mastodon.social/@bagder/114219540623402700