CVE-2025-58369
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.
How to fix
- co.fs2:fs2-io_2.123.12.2, 3.13.0-M7, 2.5.13 or later
- co.fs2:fs2-io_2.133.12.2, 3.13.0-M7, 2.5.13 or later
- co.fs2:fs2-io_33.12.2, 3.13.0-M7, 2.5.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| co.fs2:fs2-io_2.12Maven | 3.0.0-M1 ≤ v < 3.12.2, 3.13.0-M1 ≤ v < 3.13.0-M7, v < 2.5.13 | 3.12.2, 3.13.0-M7, 2.5.13 |
| co.fs2:fs2-io_2.13Maven | 3.0.0-M1 ≤ v < 3.12.2, 3.13.0-M1 ≤ v < 3.13.0-M7, v < 2.5.13 | 3.12.2, 3.13.0-M7, 2.5.13 |
| co.fs2:fs2-io_3Maven | 3.0.0-M1 ≤ v < 3.12.2, 3.13.0-M1 ≤ v < 3.13.0-M7, v < 2.5.13 | 3.12.2, 3.13.0-M7, 2.5.13 |
| co.fs2:fs2-io_0.26Maven | No range specified | — |
| co.fs2:fs2-io_0.27Maven | No range specified | — |
| co.fs2:fs2-io_2.11Maven | No range specified | — |
| co.fs2:fs2-io_2.12.0-M4Maven | No range specified | — |
| co.fs2:fs2-io_2.12.0-RC1Maven | No range specified | — |
| co.fs2:fs2-io_2.12.0-M5Maven | No range specified | — |
| co.fs2:fs2-io_2.12.0-RC2Maven | No range specified | — |
| co.fs2:fs2-io_2.13.0-M5Maven | No range specified | — |
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