Skip to content
Sign in
Not rated

CVE-2023-6205 It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to…

Description

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. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

Affected products and versions

Product Affected versions Fixed in
Firefox 120 earliest → < 120 120
Firefox ESR 115.5 earliest → < 115.5.0 115.5.0
Thunderbird 115.5 earliest → < 115.5 115.5

Other CVEs of Firefox

The 2221 CVEs of Firefox →
CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component 8.8 High CVE-2026-118027 Frame poisoning in the Layout component 9.1 Critical CVE-2026-118024 Use-after-free in the Graphics: Text component 8.8 High CVE-2026-118025 Other issue in the SVG component 8.8 High
Track this CVE