🛡️ CVE-2025-58369
🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-400 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity Medium
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE CWE-400
Public Exploit ✅ No
Source NVD
Published 2025-09-05
Updated 2026-06-15
Modified 2025-11-07
Fix URL N/A

Affected Packages

Software From version Fixed in
co.fs2:fs2-io-0.26
co.fs2:fs2-io-0.27
co.fs2:fs2-io-2.11
co.fs2:fs2-io-2.12 2.5.13
co.fs2:fs2-io-2.12.0-m4
co.fs2:fs2-io-2.12.0-m5
co.fs2:fs2-io-2.12.0-rc1
co.fs2:fs2-io-2.12.0-rc2
co.fs2:fs2-io-2.13 2.5.13
co.fs2:fs2-io-2.13.0-m5
co.fs2:fs2-io-3 2.5.13
unknown

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