CVE-2022-45405: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

Freeing arbitrary <code>nsIInputStream</code>'s on a different thread than creation could have led to a use-after-free and potentially exploitable crash. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

Affected products

• Mozilla Firefox: before 107.0 (fixed in 107.0)
• Mozilla Firefox ESR: before 102.5 (fixed in 102.5)
• Mozilla Thunderbird: before 102.5 (fixed in 102.5)

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