CVE-2025-58369
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.
- CVSS 3.1
- 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 38% of CVEs (scores of 2026-10-25)
- CWE
- CWE-400
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.12 | >=3.0.0-M1 <3.12.2 | 3.12.2 |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.12 | >=3.13.0-M1 <3.13.0-M7 | 3.13.0-M7 |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.13 | >=3.0.0-M1 <3.12.2 | 3.12.2 |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.13 | >=3.13.0-M1 <3.13.0-M7 | 3.13.0-M7 |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_3 | >=3.0.0-M1 <3.12.2 | 3.12.2 |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_3 | >=3.13.0-M1 <3.13.0-M7 | 3.13.0-M7 |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_0.26 | all versions | no fix published |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_0.27 | all versions | no fix published |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.11 | all versions | no fix published |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.12.0-M4 | all versions | no fix published |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.12.0-RC1 | all versions | no fix published |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.12.0-M5 | all versions | no fix published |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.12.0-RC2 | all versions | no fix published |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.13.0-M5 | all versions | no fix published |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.12 | <2.5.13 | 2.5.13 |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_2.13 | <2.5.13 | 2.5.13 |
| GHSA-rrw2-px9j-qffj | Maven | co.fs2:fs2-io_3 | <2.5.13 | 2.5.13 |
References
- https://github.com/typelevel/fs2/commit/46e2dc3abf994dcf3d0b804b2ddb3c10c04d4976
- https://github.com/typelevel/fs2/commit/5c6c4c6c1ef330f7e6b53661ecc63d5f5ba8885c
- https://github.com/typelevel/fs2/commit/edf0c4f2e660360d1c1a8c5377ce32294de89238
- https://github.com/typelevel/fs2/issues/3590
- https://github.com/typelevel/fs2/releases/tag/v3.12.2