CVE-2011-1159 (acpid.c in acpid before 2.0.9 does not properly handle a situation in which a process has connected to acpid.socket but is not reading any data, which allows local users to cause a denial of service (daemon hang) via a crafted application that performs a connect system call but no read system calls.)
CVE-2009-0798 (ACPI Event Daemon (acpid) before 1.0.10 allows remote attackers to cause a denial of service (CPU consumption and connectivity loss) by opening a large number of UNIX sockets without closing them, which triggers an infinite loop.)