If the Compact() method was called on an nsTArray, the array could have been reallocated without updating other pointers, leading to a potential use-after-free and exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.
[
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"status": "affected",
"version": "< 83"
}
]
},
{
"product": "Firefox ESR",
"vendor": "Mozilla",
"versions": [
{
"status": "affected",
"version": "< 78.5"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"status": "affected",
"version": "< 78.5"
}
]
}
]