A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel’s cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.
[
{
"product": "kernel",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Fixed in kernel 5.14 rc2"
}
]
}
]