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.
CVE-2025-58369
“—” beside the score: it is equal to NVD's CVSS score.
Score 5.3 from GitHub Security Advisory (severity: MODERATE) published 2025-09-05. NVD baseline CVSS 5.3; sources differ by 0.0.
Also known asEUVD-2025-27048 (ENISA EUVD) · GHSA-rrw2-px9j-qffj (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 5.3
- EG Score
- 5.3MEDIUMmedium confidence
- EG Risk
- 24EG Risk 24/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity53% × 45%Impact severity (EG Severity): CVSS 5.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.4% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.4%
- EPSS %ILE
- 38th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (5.3): severity, escalated by confirmed exploitation. This CVE's 5.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.3 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
September 5, 2025
Last Modified
October 1, 2026
Advisory Details (7)
Auto-updated Oct 1, 2026Half-shutdown of socket during TLS handshake may result in spin loop on opposite side · Advisory · typelevel/fs2 · GitHub
https://github.com/typelevel/fs2/security/advisories/GHSA-rrw2-px9j-qffjv3.13.0-M7
Patch available: typelevel/fs2 v3.13.0-M7 (pre-release)
https://github.com/typelevel/fs2/releases/tag/v3.13.0-M7v3.12.2
Patch available: typelevel/fs2 v3.12.2
https://github.com/typelevel/fs2/releases/tag/v3.12.2Test http4s servers fail release bound port on shutdown when using fs2 3.12.0 · Issue #3590 · typelevel/fs2 · GitHub
https://github.com/typelevel/fs2/issues/3590commit edf0c4f2e660 (typelevel/fs2)
Patch available: typelevel/fs2 v2.5.13 (contains commit edf0c4f2e660)
https://github.com/typelevel/fs2/commit/edf0c4f2e660360d1c1a8c5377ce32294de89238commit 5c6c4c6c1ef3 (typelevel/fs2)
Patch available: typelevel/fs2 v3.12.2 (contains commit 5c6c4c6c1ef3)
https://github.com/typelevel/fs2/commit/5c6c4c6c1ef330f7e6b53661ecc63d5f5ba8885ccommit 46e2dc3abf99 (typelevel/fs2)
Patch available: typelevel/fs2 v3.12.2 (contains commit 46e2dc3abf99)
https://github.com/typelevel/fs2/commit/46e2dc3abf994dcf3d0b804b2ddb3c10c04d4976Patch Availability(11)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| maven | co.fs2:fs2-io_0.26 | — | ghsa |
| maven | co.fs2:fs2-io_0.27 | — | ghsa |
| maven | co.fs2:fs2-io_2.11 | — | ghsa |
| maven | co.fs2:fs2-io_2.12 @ 3.13.0-M7 (fixes >= 3.13.0-M1, < 3.13.0-M7) | — | ghsa |
| maven | co.fs2:fs2-io_2.12 @ 3.12.2 (fixes >= 3.0.0-M1, < 3.12.2) | — | ghsa |
| maven | co.fs2:fs2-io_2.12 @ 2.5.13 (fixes < 2.5.13) | — | ghsa |
| maven | co.fs2:fs2-io_2.12.0-M4 | — | ghsa |
| maven | co.fs2:fs2-io_2.12.0-M5 | — | ghsa |
| maven | co.fs2:fs2-io_2.12.0-RC1 | — | ghsa |
| maven | co.fs2:fs2-io_2.12.0-RC2 | — | ghsa |
| maven | co.fs2:fs2-io_2.13.0-M5 | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(11 across 1 ecosystem)
Maven(11)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| co.fs2:fs2-io_0.26 | 2.4-4ed62ae ... 3.0-a355a2e (11 versions) |
| — |
| co.fs2:fs2-io_0.27 | 2.4-0076a63 ... 3.0.0-M3 (145 versions) |
| — |
| co.fs2:fs2-io_2.11 | 0.10.0 ... 2.1.0 (56 versions) |
| — |
| co.fs2:fs2-io_2.12 | 0.10.0 ... 2.5.9 (206 versions) |
| — |
| co.fs2:fs2-io_2.12.0-M4 | 0.9.0-M1, 0.9.0-M2, 0.9.0-M3, 0.9.0-M4 |
| — |
| co.fs2:fs2-io_2.12.0-M5 | 0.9.0-M5, 0.9.0-M6, 0.9.0-RC1, 0.9.0-RC2 |
| — |
| co.fs2:fs2-io_2.12.0-RC1 | 0.9.0, 0.9.1 |
| — |
| co.fs2:fs2-io_2.12.0-RC2 | 0.9.1 |
| — |
| co.fs2:fs2-io_2.13 | 1.1.0-M1 ... 2.5.9 (165 versions) |
| — |
| co.fs2:fs2-io_2.13.0-M5 | 1.0.3, 1.0.4 |
| — |
| co.fs2:fs2-io_3 | 2.5-13-1a7ce3e ... 2.5.9 (27 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 40× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 95 of 230 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 5 repeat rows among the latest 100 are merged into the row they repeat. The 135 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-11-01 08:03 UTCGHSA enrichmentGHSA-rrw2-px9j-qffj · GitHub severity MODERATE · GitHub CVSS 5.3
- 2026-11-01 08:03 UTCEG score recompute
- 2026-10-31 22:55 UTCOSV refresh
- 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-29 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-25 16:16 UTCEG score recompute
- 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-23 16:47 UTCEG score recompute
- 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.4% · 37th percentile
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
- 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
- 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-18 05:24 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-16 16:39 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
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- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-12 16:54 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-11 20:28 UTCEG score recompute
- 2026-10-11 18:40 UTCEG score recompute
- 2026-10-11 15:15 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-08 17:10 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-10-01 16:14 UTCEG score recompute
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-26 00:25 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-21 21:06 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-19 15:42 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-17 19:29 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-16 19:09 UTCOSV refresh
- 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-05 15:28 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-01 04:38 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-30 19:16 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-28 18:53 UTCOSV refresh
- 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-24 09:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-23 00:18 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-20 22:54 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-18 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-16 14:55 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-16 02:13 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-15 01:29 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-13 21:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-12 06:47 UTCOSV refresh
- 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-08 16:36 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-07 16:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
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Frequently asked(5)
What is CVE-2025-58369?
When was the CVE record for CVE-2025-58369 published?
Is CVE-2025-58369 actively exploited?
What is the CVSS score of CVE-2025-58369?
How do I remediate CVE-2025-58369?
Dependency Blast Radius
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