CVE-2024-1300

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 1.1%, top 39% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.4Exploit: None knownExposed: 0

A fix is available — apply it.

A vulnerability in the Eclipse Vert.x toolkit causes a memory leak in TCP servers configured with TLS and SNI support. When processing an unknown SNI server name assigned the default certificate instead of a mapped certificate, the SSL context is erroneously cached in the server name map, leading to memory exhaustion. This flaw allows attackers to send TLS client hello messages with fake server names, triggering a JVM out-of-memory error.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
63%
KEV
Not listed

Published

April 2, 2024

Last Modified

August 4, 2026

Advisory Details (10)

Auto-updated Aug 4, 2026
Patch available. Sources: redhat.
redhat Patch Available

2263139 – (CVE-2024-1300) CVE-2024-1300 io.vertx:vertx-core: memory leak when a TCP server is configured with TLS and SNI support

https://bugzilla.redhat.com/show_bug.cgi?id=2263139
redhat Patch Available

CVE-2024-1300 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2024-1300
redhat Patch Available
https://access.redhat.com/errata/RHSA-2024:4884
redhat Patch Available
https://access.redhat.com/errata/RHSA-2024:3989
redhat Patch Available
https://access.redhat.com/errata/RHSA-2024:3527
redhat Patch Available
https://access.redhat.com/errata/RHSA-2024:2833
redhat Patch Available
https://access.redhat.com/errata/RHSA-2024:2088
redhat Patch Available
https://access.redhat.com/errata/RHSA-2024:1923
redhat Patch Available
https://access.redhat.com/errata/RHSA-2024:1706
redhat Patch Available
https://access.redhat.com/errata/RHSA-2024:1662

Vendor Advisories for CVE-2024-1300(8)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatvertx-core2024-07-25redhat
redhatmta/mta-windup-addon-rhel9:6.2.3-22024-06-20redhat
redhatcryostat-tech-preview/jfr-datasource-rhel8:2.4.0-42024-04-29redhat
redhatmtr/mtr-web-executor-container-rhel8:1.2-102024-04-18redhat
redhatio.vertx/vertx-core:4.4.8.redhat-000012024-04-03redhat

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

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
io.vertx:vertx-core4.5.0, 4.5.1, 4.5.24.5.3—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 182 total refreshes for this CVE.

  1. 2026-09-18 19:26 UTCEPSS rescore
  2. 2026-09-16 14:06 UTCEPSS rescore
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  1. 2026-08-18 13:46 UTCEPSS rescore
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  3. 2026-08-16 14:54 UTCEPSS rescore
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  5. 2026-08-15 01:28 UTCEPSS rescore
  6. 2026-08-13 21:58 UTCEPSS rescore
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  9. 2026-08-10 23:58 UTCEPSS rescore
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  16. 2026-08-04 20:35 UTCVendor advisory
  17. 2026-08-04 19:31 UTCEG score recompute
  18. 2026-08-04 19:31 UTCVendor advisory
  19. 2026-08-04 15:08 UTCEPSS rescore
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  26. 2026-07-30 16:26 UTCEPSS rescore
  27. 2026-07-30 01:29 UTCEPSS rescore
  28. 2026-07-28 15:34 UTCEPSS rescore
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  36. 2026-07-23 02:32 UTCEG score recompute
  37. 2026-07-22 23:19 UTCEG score recompute
  38. 2026-07-22 14:07 UTCEPSS rescore
  39. 2026-07-21 15:23 UTCEPSS rescore
  40. 2026-07-20 17:06 UTCEPSS rescore
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  46. 2026-07-15 16:56 UTCEPSS rescore
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  50. 2026-07-13 22:28 UTCEPSS rescore
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  74. 2026-06-25 13:48 UTCEPSS rescore
  75. 2026-06-24 14:04 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-1300?
CVE-2024-1300 is a medium vulnerability published on April 2, 2024. A vulnerability in the Eclipse Vert.x toolkit causes a memory leak in TCP servers configured with TLS and SNI support. When processing an unknown SNI server name assigned the default certificate instead of a mapped certificate, the SSL context is erroneously cached in the server name map, leading…
When was CVE-2024-1300 disclosed?
CVE-2024-1300 was first published in the National Vulnerability Database on April 2, 2024, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-1300 actively exploited?
CVE-2024-1300 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 36.9% of all scored CVEs.
What is the CVSS score of CVE-2024-1300?
CVE-2024-1300 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2024-1300?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-1300, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-1300

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