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CVE-2020-6820

Known Exploited (CISA KEV)HIGH

8.1

CVSS Severity Score

EPSS Score73.7250%

EPSS Percentile90.07th

Published2020年4月24日

Last Modified2025年11月4日

Vulnerability Description

Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.

Affected Platforms (CPE)

📦

Mozilla

Firefox

< 68.6.1

📦

Mozilla

Firefox

< 74.0.1

📦

Mozilla

Thunderbird

< 68.7.0

References & Advisories

🔗 https://bugzilla.mozilla.org/show_bug.cgi?id=1626728

🔗 https://usn.ubuntu.com/4335-1/

🔗 https://www.mozilla.org/security/advisories/mfsa2020-11/

🔗 https://www.mozilla.org/security/advisories/mfsa2020-14/

🔗 https://bugzilla.mozilla.org/show_bug.cgi?id=1626728

🔗 https://usn.ubuntu.com/4335-1/

🔗 https://www.mozilla.org/security/advisories/mfsa2020-11/

🔗 https://www.mozilla.org/security/advisories/mfsa2020-14/

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