CVE-2022-38476: Mozilla Firefox ESR

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A data race could occur in the <code>PK11_ChangePW</code> function, potentially leading to a use-after-free vulnerability. In Firefox, this lock protected the data when a user changed their master password. This vulnerability affects Firefox ESR < 102.2 and Thunderbird < 102.2.

Affected products

• Mozilla Firefox ESR: before 102.2 (fixed in 102.2)
• Mozilla Thunderbird: before 102.2 (fixed in 102.2)

Published 2022-12-22. Last modified 2026-06-17.