CVE-2023-6205

Mozilla: Use-after-free in MessagePort::Entangled

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · November 21, 2023

Updated · November 22, 2025

Description

The Mozilla Foundation Security Advisory describes this flaw as:

It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an exploitable crash.

Statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-416 · Use After Free