Affected Users: Applications using wolfSSL’s OpenSSL compatibility layer before wolfSSL version 5.8.2 that call both RAND_bytes() and fork() operations. This does not affect internal TLS operations or applications that do not explicitly use RAND_bytes(). Summary: A vulnerability was discovered in wolfSSL’s OpenSSL compatibility layer where the RAND_poll() function was not behaving as expected, leading to […]
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Vulnerability Disclosure: wolfSSL Fault Injection Attack on ECC and Ed25519 Verify Operations
Affected Users: Users performing ECC or Ed25519 signature verification operations on devices that may be susceptible to fault injection attacks, particularly in security-critical applications such as secure boot implementations. Summary: A potential vulnerability to fault injection attacks was identified in wolfSSL’s ECC and Ed25519 signature verification operations. Fault injection is a sophisticated physical attack technique […]
Read MoreMore TagwolfSSH v1.4.22 Release
Look at that! wolfSSH had another release. New year, new version. Welcome to wolfSSH v1.4.22. This is mainly a bug fix release. We’ve improved interoperability with other implementations of SSH. We’ve improved the build process with several IDEs, Zephyr, and LwIP. We also added an SFTP client example for the Renesas RX72N platform. There is […]
Read MoreMore TagGetting Started with wolfSSL – Part 2: Configuration, Embedded Porting, and Advanced TLS Features
Learn how to configure, extend, and troubleshoot secure TLS applications with wolfSSL. Following Part 1 of our Getting Started with wolfSSL webinar series, Part 2 dives deeper into the topics developers encounter once basic TLS integration is complete. This session focuses on configuration, embedded deployment, and advanced TLS features used in real-world systems. Led by […]
Read MoreMore TagVulnerability Disclosure: wolfSSH CVE-2025-11624
Affected Users: wolfSSH with SFTP enabled on the server side before version 1.4.21. Summary: A stack overflow vulnerability was discovered in wolfSSH’s SFTP server implementation. After an SFTP connection is established, a malicious SFTP client could send a specially crafted read, write, or set state SFTP packet that would cause the SFTP server code to […]
Read MoreMore TagBringing FIPS 140-3 to Proxmox Virtual Environments with wolfCrypt-FIPS
Organizations in government, healthcare, finance, and critical infrastructure sectors are required to meet stringent compliance standards, and FIPS 140-3 certification has become a key requirement for cryptographic modules used in regulated environments. wolfSSL is uniquely positioned to help bring this level of certification to Proxmox Virtual Environment (PVE), one of the most popular open-source virtualization […]
Read MoreMore TagThe DEADBEEF RNG Example Revisited
A while ago we had made a blog post and a patch that showed how someone could integrate their new RNG (Random Number Generator) into our wolfCrypt library. That methodology works, but it has a fairly obvious flaw. It assumed your RNG included the DRBG (Deterministic Random Bit Generator) as part of its implementation. You […]
Read MoreMore TagVulnerability Disclosure: wolfSSL (CVE-2025-7395)
Affected Users: Anyone using wolfSSL on Apple platforms with versions after 5.7.6 and before 5.8.2, specifically when built with WOLFSSL_SYS_CA_CERTS and WOLFSSL_APPLE_NATIVE_CERT_VALIDATION enabled (default for non-macOS Apple targets when using autotools or CMake). Summary: When using system CA certificates and Apple native certificate validation on Apple platforms, the native trust store verification routine incorrectly overrides […]
Read MoreMore TagKick Off 2026 with wolfSSL: Two-Part Getting Started with wolfSSL Webinar
Learn how to build, configure, and debug secure TLS applications with wolfSSL. Join us for this two-part technical webinar series, Getting Started with wolfSSL. These sessions walk through the fundamentals of wolfSSL—from building the library to integrating TLS into real applications. Led by wolfSSL Engineering Manager Chris Conlon, the series focuses on practical concepts, core […]
Read MoreMore TagCrypto-Agility in the LMS Private Key
Here at wolfSSL, we have enhanced our Leighton-Micali Signature (LMS) implementation with a new optional state serialization feature that significantly improves key reload performance for applications requiring frequent signing operations. The LMS post-quantum signature scheme is stateful by nature, meaning each signature operation updates the internal state of the private key, and this state must […]
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