There is a null pointer dereference in llcp_sock_getname in net/nfc/llcp_sock.c reproduced in linux-5.13.0-rc2. An unprivileged user can trigger this bug and cause denial of service. https://seclists.org/oss-sec/2021/q2/177 https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=4ac06a1e013c CREATE(Triage):(User=admin) CVE-2021-3587 (https://nvd.nist.gov/vuln/detail/CVE-2021-3587)
