Use-after-free vulnerability in nsDNSService::Init in Firefox ESR and Thunderbird before 115.6

CVE-2023-6862 · HIGH Severity

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

A use-after-free was identified in the `nsDNSService::Init`. This issue appears to manifest rarely during start-up. This vulnerability affects Firefox ESR < 115.6 and Thunderbird < 115.6.

Learn more about our Web Application Penetration Testing UK.