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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2025-58369

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

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

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 session, if one side of the connection shuts down `write` while the peer side is awaiting more data to progress the TLS handshake, the peer side will spin loop on the socket read, fully utilizing a CPU. The CPU is consumed until the overall connection is closed, potentially shutting down a fs2-io powered server. This issue is fixed in versions 2.5.13, 3.12.1, and 3.13.0-M7.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

typelevel fs2

  • >= 3.0.0-M1, < 3.12.2affected
  • >= 3.13.0-M1, < 3.13.0-M7affected
  • < 2.5.13affected

References