description: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
problem types: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free
affected:
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 84, status: affected, version: unspecified, versionType: custom
}
{
product: Thunderbird
vendor: Mozilla
versions:
lessThan: 78.6, status: affected, version: unspecified, versionType: custom
}
{
product: Firefox ESR
vendor: Mozilla
versions:
lessThan: 78.6, status: affected, version: unspecified, versionType: custom
}
