Firetruck

CVE-2020-6819

KEV
Updated Oct 21, 2025 · PUBLISHED
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Description

Mozilla Firefox and Thunderbird contain a race condition vulnerability when running the nsDocShell destructor under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.

Full record on cve.org →

Affected packages

PackageVendor / ProductVersion rangeStatus
FirefoxMozilla / Firefox>= unspecified, < 74.0.1affected
Firefox ESRMozilla / Firefox ESR>= unspecified, < 68.6.1affected
ThunderbirdMozilla / Thunderbird>= unspecified, < 68.7.0affected