CVE-2025-58369 fs2: Half-shutdown of socket during TLS handshake may result in spin loop on opposite side

fs2 is a compositional, streaming I/O library for Scala. Versions up to and including 2.5.12, 3.0.0-M1 through 3.12.2, and 3.13.0-M1 through 3.13.0-M6 are vulnerable to denial of service attacks though TLS sessions using fs2-io on the JVM using the fs2.io.net.tls package. When establishing a TLS...

CVE-2025-58369

CVE-2025-58369 affects fs2 (Scala) with fs2-io TLS on the JVM. The vulnerability exists in versions up to 2.5.12, 3.0.0-M1…3.12.2, and 3.13.0-M1…3.13.0-M6, where during TLS handshake a peer that shuts down write while the other side awaits data can spin the socket read, causing high CPU usage and...

CVE-2022-31183 mTLS client verification is skipped in fs2 on Node.js

fs2 is a compositional, streaming I/O library for Scala. When establishing a server-mode TLSSocket using fs2-io on Node.js, the parameter requestCert = true is ignored, peer certificate verification is skipped, and the connection proceeds. The vulnerability is limited to: 1. fs2-io running on...