CVE-2020-6820
Mozilla Firefox And Thunderbird Use-After-Free Vulnerability
Summary
Mozilla Firefox and Thunderbird contain a race condition vulnerability when handling a ReadableStream under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.
Affected software
Vendor: Mozilla · Product: Firefox and Thunderbird
Weakness types (CWE):
What to do
This vulnerability appears in CISA's Known Exploited Vulnerabilities catalog, meaning it is being exploited in the wild. Prioritize patching affected systems and verify exposure across your estate.
Related vulnerabilities in Mozilla
| CVE | Name | EPSS | Exploited |
|---|---|---|---|
| CVE-2016-9079 | Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability | 87.6% | Yes |
| CVE-2010-3765 | Mozilla Multiple Products Remote Code Execution Vulnerability | 83.3% | Yes |
| CVE-2013-1690 | Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability | 69.0% | Yes |
| CVE-2015-4495 | Mozilla Firefox Security Feature Bypass Vulnerability | 67.3% | Yes |
| CVE-2019-11708 | Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability | 55.9% | Yes |
| CVE-2019-17026 | Mozilla Firefox And Thunderbird Type Confusion Vulnerability | 43.7% | Yes |
| CVE-2019-11707 | Mozilla Firefox and Thunderbird Type Confusion Vulnerability | 38.0% | Yes |
| CVE-2024-9680 | Mozilla Firefox Use-After-Free Vulnerability | 23.2% | Yes |
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