{"id":"CVE-2025-58369","aliases":["GHSA-rrw2-px9j-qffj"],"url":"https://o3.security/vulnerability/CVE-2025-58369","summary":"fs2: Half-shutdown of socket during TLS handshake may result in spin loop on opposite side","details":"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.","published":"2025-09-05T21:59:58.981Z","modified":"2026-08-12T03:51:44.253067866Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.12","fixedVersion":"3.12.2"},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.12","fixedVersion":"3.13.0-M7"},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.13","fixedVersion":"3.12.2"},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.13","fixedVersion":"3.13.0-M7"},{"ecosystem":"Maven","name":"co.fs2:fs2-io_3","fixedVersion":"3.12.2"},{"ecosystem":"Maven","name":"co.fs2:fs2-io_3","fixedVersion":"3.13.0-M7"},{"ecosystem":"Maven","name":"co.fs2:fs2-io_0.26","fixedVersion":null},{"ecosystem":"Maven","name":"co.fs2:fs2-io_0.27","fixedVersion":null},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.11","fixedVersion":null},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.12.0-M4","fixedVersion":null},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.12.0-RC1","fixedVersion":null},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.12.0-M5","fixedVersion":null},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.12.0-RC2","fixedVersion":null},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.13.0-M5","fixedVersion":null},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.12","fixedVersion":"2.5.13"},{"ecosystem":"Maven","name":"co.fs2:fs2-io_2.13","fixedVersion":"2.5.13"},{"ecosystem":"Maven","name":"co.fs2:fs2-io_3","fixedVersion":"2.5.13"}],"fix":{"url":"https://github.com/typelevel/fs2/commit/46e2dc3abf994dcf3d0b804b2ddb3c10c04d4976","label":"typelevel/fs2@46e2dc3"},"references":[{"type":"WEB","url":"https://github.com/typelevel/fs2/releases/tag/v3.12.2"},{"type":"WEB","url":"https://github.com/typelevel/fs2/releases/tag/v3.13.0-M7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/58xxx/CVE-2025-58369.json"},{"type":"ADVISORY","url":"https://github.com/typelevel/fs2/security/advisories/GHSA-rrw2-px9j-qffj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-58369"},{"type":"REPORT","url":"https://github.com/typelevel/fs2/issues/3590"},{"type":"FIX","url":"https://github.com/typelevel/fs2/commit/46e2dc3abf994dcf3d0b804b2ddb3c10c04d4976"},{"type":"FIX","url":"https://github.com/typelevel/fs2/commit/5c6c4c6c1ef330f7e6b53661ecc63d5f5ba8885c"},{"type":"FIX","url":"https://github.com/typelevel/fs2/commit/edf0c4f2e660360d1c1a8c5377ce32294de89238"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:44.253067866Z"}}