{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.0.0-M1"
              },
              {
                "fixed": "3.12.2"
              }
            ]
          },
          "events": [
            {
              "introduced": "69a2778184eb2d9084c20fc1560c074231914d60"
            },
            {
              "fixed": "46e2dc3abf994dcf3d0b804b2ddb3c10c04d4976"
            }
          ],
          "repo": "https://github.com/typelevel/fs2",
          "type": "GIT"
        },
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.13.0-M1"
              },
              {
                "fixed": "3.13.0-M7"
              }
            ]
          },
          "events": [
            {
              "introduced": "5af859e9cca301df4e44368d2cbd1110d3d176bf"
            },
            {
              "fixed": "55b55dbe3199abecd79e739048d5c5046cd65b7a"
            }
          ],
          "repo": "https://github.com/typelevel/fs2",
          "type": "GIT"
        },
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.5.13"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "edf0c4f2e660360d1c1a8c5377ce32294de89238"
            }
          ],
          "repo": "https://github.com/typelevel/fs2",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rrw2-px9j-qffj"
  ],
  "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"
  },
  "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.",
  "id": "CVE-2025-58369",
  "modified": "2026-04-01T23:09:11.319999207Z",
  "published": "2025-09-05T21:59:58.981Z",
  "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"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fs2: Half-shutdown of socket during TLS handshake may result in spin loop on opposite side"
}