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CVE-2020-6820

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...

Basic Information

CVE State: PUBLISHED
Reserved Date: January 10, 2020
Published Date: April 24, 2020
Last Updated: February 07, 2025
Vendor: Mozilla
Product: Thunderbird, Firefox, Firefox ESR
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.

CVSS Scores

SSVC Information

Exploitation: active
Technical Impact: total

Exploit Status

Exploited in the Wild: Yes (added 2021-11-03 00:00:00 UTC) Source

References

https://www.mozilla.org/security/advisories/mfsa2020-14/ https://www.mozilla.org/security/advisories/mfsa2020-11/ https://bugzilla.mozilla.org/show_bug.cgi?id=1626728 https://usn.ubuntu.com/4335-1/

Known Exploited Vulnerability Information

Source	Added Date
CISA	2021-11-03 00:00:00 UTC