CVE-2025-58369
fs2: Half-shutdown of socket during TLS handshake may result in spin loop on opposite side
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Timeline
ID reserved
By GitHub_M
- 7 days later
· 7 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Deferred | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.47% · top 59% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenco.fs2:fs2-io_0.26GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_0.27GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_2.11GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_2.12GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_2.12.0-M4GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_2.12.0-M5GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_2.12.0-RC1GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_2.12.0-RC2GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_2.13GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_2.13.0-M5GHSA-rrw2-px9j-qffj (opens in a new tab)
- Mavenco.fs2:fs2-io_3GHSA-rrw2-px9j-qffj (opens in a new tab)
References (7)
- https://github.com/typelevel/fs2/security/advisories/GHSA-rrw2-px9j-qffj (opens in a new tab)x_refsource_CONFIRM
- https://github.com/typelevel/fs2/issues/3590 (opens in a new tab)x_refsource_MISC
- https://github.com/typelevel/fs2/commit/46e2dc3abf994dcf3d0b804b2ddb3c10c04d4976 (opens in a new tab)x_refsource_MISC
- https://github.com/typelevel/fs2/commit/5c6c4c6c1ef330f7e6b53661ecc63d5f5ba8885c (opens in a new tab)x_refsource_MISC
- https://github.com/typelevel/fs2/commit/edf0c4f2e660360d1c1a8c5377ce32294de89238 (opens in a new tab)x_refsource_MISC
- https://github.com/typelevel/fs2/releases/tag/v3.12.2 (opens in a new tab)x_refsource_MISC
- https://github.com/typelevel/fs2/releases/tag/v3.13.0-M7 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-rrw2-px9j-qffj (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2025-58369)Record last updated .