The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-25220.json"
[
{
"events": [
{
"introduced": "4.9.0"
},
{
"fixed": "4.9.233"
}
]
},
{
"events": [
{
"introduced": "4.14"
},
{
"fixed": "4.14.194"
}
]
},
{
"events": [
{
"introduced": "4.19"
},
{
"fixed": "4.19.140"
}
]
}
]