kernel/ucount.c in the Linux kernel 5.14 through 5.16.4, when unprivileged user namespaces are enabled, allows a use-after-free and privilege escalation because a ucounts object can outlive its namespace.
| Product | Vendor | Version |
|---|---|---|
| n/a | n/a | < d3295fee3c756ece33ac0d935e172e68c0a4161b |