In Qt before 5.15.15, 6.x before 6.2.9, and 6.3.x through 6.5.x before 6.5.2, there can be an application crash in QXmlStreamReader via a crafted XML string that triggers a situation in which a prefix is greater than a length.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "5.15.15"
},
{
"introduced": "6.0.0"
},
{
"fixed": "6.2.9"
},
{
"introduced": "6.3.0"
},
{
"fixed": "6.5.2"
}
]
}