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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 inst…

Medium CVSS 5.4
CVECVE-2024-1300
First seen2026-08-04 20:30 UTC
Disclosed2024-04-02 08:15 UTC
Last updated2026-08-04 20:30 UTC
Channel statusauto

Summary

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.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Lint boundary warnings (2)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://vertx.io/docs/vertx-core/java/#_server_name_indication_sni.
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://vertx.io/docs/vertx-core/java/#_server_name_indication_sni.

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD