| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 70.0 | 70.0 |
| firefox esr | < 68.2 | 68.2 |
| thunderbird | < 68.2 | 68.2 |
When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
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