high8.8
CVE-2021-23960
Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mozilla | Firefox | before 85.0 |
| Mozilla | Firefox Esr | before 78.7 |
| Mozilla | Thunderbird | before 78.7 |
References
- NVD record
- CVE.org record
- https://bugzilla.mozilla.org/show_bug.cgi?id=1675755
- https://www.mozilla.org/security/advisories/mfsa2021-03/
- https://www.mozilla.org/security/advisories/mfsa2021-04/
- https://www.mozilla.org/security/advisories/mfsa2021-05/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1675755
- https://www.mozilla.org/security/advisories/mfsa2021-03/
- https://www.mozilla.org/security/advisories/mfsa2021-04/
- https://www.mozilla.org/security/advisories/mfsa2021-05/