Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace CREATE(Triage):(User=admin) CVE-2023-31248 (https://nvd.nist.gov/vuln/detail/CVE-2023-31248)
