{"id":"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.","aliases":["GHSA-rrw2-px9j-qffj"],"modified":"2026-08-12T03:51:44.253067866Z","published":"2025-09-05T21:59:58.981Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/58xxx/CVE-2025-58369.json"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/typelevel/fs2","events":[{"introduced":"69a2778184eb2d9084c20fc1560c074231914d60"},{"fixed":"46e2dc3abf994dcf3d0b804b2ddb3c10c04d4976"},{"introduced":"5af859e9cca301df4e44368d2cbd1110d3d176bf"},{"fixed":"33135666010b906d99941f7abefd230f838bb972"},{"fixed":"5c6c4c6c1ef330f7e6b53661ecc63d5f5ba8885c"},{"fixed":"edf0c4f2e660360d1c1a8c5377ce32294de89238"},{"fixed":"55b55dbe3199abecd79e739048d5c5046cd65b7a"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"3.0.0-M1"},{"fixed":"3.12.2"},{"introduced":"3.13.0-M1"},{"fixed":"3.13.0-M6"}]}}],"versions":["v3.12.1","v3.12.0","v3.13.0-M6","v3.13.0-M5","v3.13.0-M4","v3.13.0-M3","v3.13.0-M2","v3.13.0-M1","v3.12.0-RC2","v3.11.0","v3.10.2","v3.10.1","v3.10.0","v3.9.4","v3.9.3","v3.9.2","v3.9.1","v3.9.0","v3.8.0","v3.7.0","v3.7.0-RC5","v3.7.0-RC4","v3.7.0-RC3","v3.7.0-RC2","v3.6.1","v3.6.0","v3.5.0","v3.4.0","v3.3.0","v3.2.14","v3.2.13","v3.2.12","v3.2.9","v3.2.10","v3.2.8","v3.2.7","v3.2.6","v3.2.5","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.2.0","v3.1.6","v3.1.5","v3.1.4","v3.1.2","v3.1.1","v3.1.0","v3.0.6","v3.0.5","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v3.0.0-M9","v3.0.0-M8","v3.0.0-M7","v3.0.0-M6","v3.0.0-M5","v3.0.0-M4","v3.0.0-M3","v3.0.0-M2","v3.0.0-M1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-58369.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}