CVE-2021-23960

Description

Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

References

https://www.mozilla.org/security/advisories/mfsa2021-05/

https://www.mozilla.org/security/advisories/mfsa2021-04/

https://www.mozilla.org/security/advisories/mfsa2021-03/

https://bugzilla.mozilla.org/show_bug.cgi?id=1675755

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3