View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2011-1159 medium priority: Ubuntu including 1 source packages (acpid), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): released 4, ignored 1, not-affected 1.
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.