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.
problem types: Use-after-poison for incorrectly redeclared JavaScript variables during GC
affected:
{
product: Firefox
vendor: Mozilla
versions:
status: affected, version: < 85
}
{
product: Thunderbird
vendor: Mozilla
versions:
status: affected, version: < 78.7
}
{
product: Firefox ESR
vendor: Mozilla
versions:
status: affected, version: < 78.7
}
