CVE-2024-1300

Io.vertx:vertx-core: memory leak when a tcp server is configured with tls and sni support

MEDIUM
5.4
CVSS Score
Published: April 2, 2024 at 07:33 AM UTC
Updated: September 23, 2026 at 04:17 AM UTC
9 products affected across 1 vendorBuild of KeycloakBuild of QuarkusProcess Automation

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Severity
MEDIUM5.4
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 4.4 (unaffected)
All versions
Vendor states this is fixed in 4.4.8.redhat-1 (unaffected)
Vendor states this is fixed in 3.2 (unaffected)

References (11)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-401CWE-772

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