| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 71.0 | 71.0 |
| firefox esr | < 68.3 | 68.3 |
| thunderbird | < 68.3 | 68.3 |
The plain text serializer used a fixed-size array for the number of <ol> elements it could process; however it was possible to overflow the static-sized array leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
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