MuPDF through 1.18.1 has an out-of-bounds write because the cached color converter does not properly consider the maximum key size of a hash table. This can, for example, be seen with crafted "mutool draw" input.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-37220.json"
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.18.1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "34"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.18.1"
}
]
}
]