A use-after-free vulnerability can occur when the SMIL animation controller incorrectly registers with the refresh driver twice when only a single registration is expected. When a registration is later freed with the removal of the animation controller element, the refresh driver incorrectly leaves a dangling pointer to the driver's observer array. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.
[
{
"events": [
{
"introduced": "0"
},
{
"fixed": "60.6.0"
}
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{
"events": [
{
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{
"fixed": "66.0"
}
]
},
{
"events": [
{
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{
"fixed": "60.6.0"
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}
]
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9796.json"