CVE-2020-6819: Mozilla Firefox And Thunderbird Use-After-Free Vulnerability
Description
CVE-2020-6819 is a use-after-free vulnerability in Mozilla Firefox and Thunderbird caused by a race condition in the nsDocShell destructor. This flaw can lead to memory corruption with unspecified impacts. It has been exploited in the wild, indicating active threat usage. No specific affected versions or patch information is provided in the input data.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Mozilla Firefox and Thunderbird contain a race condition vulnerability in the nsDocShell destructor that results in a use-after-free condition. This vulnerability is identified as CVE-2020-6819 and is associated with CWE-362 (Race Condition) and CWE-416 (Use After Free). The race condition occurs under certain conditions during object destruction, potentially leading to memory corruption. The vulnerability has been exploited in the wild, but the exact impact details are unspecified in the provided data.
Potential Impact
Exploitation of this vulnerability can lead to use-after-free memory corruption, which may allow attackers to execute arbitrary code or cause application crashes. The exact impact is unspecified, but the known exploitation in the wild indicates a high risk to affected users of Firefox and Thunderbird.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should monitor Mozilla's security advisories for updates and apply any available updates promptly once released.
Threat ID: 6adc6f613fe894698b2dda29
Added to database: 10/24/2026, 08:42:09 UTC
Last enriched: 10/24/2026, 09:10:22 UTC
Last updated: 10/24/2026, 09:30:24 UTC
Views: 3
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