Description
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.
References10
- access.redhat.com/errata/RHSA-2024:1662
- access.redhat.com/errata/RHSA-2024:1706
- access.redhat.com/errata/RHSA-2024:1923
- access.redhat.com/errata/RHSA-2024:2088
- access.redhat.com/errata/RHSA-2024:2833
- access.redhat.com/errata/RHSA-2024:3527
- access.redhat.com/errata/RHSA-2024:3989
- access.redhat.com/errata/RHSA-2024:4884
- access.redhat.com/security/cve/CVE-2024-1300
- bugzilla.redhat.com/show_bug.cgi?id=2263139
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L - EPSS — exploit probability
- 1% percentile: 65 · as of 5 November 2026
- CWE
- CWE-772
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.