SystemTap is an instrumentation system for systems running the Linuxkernel, version 2.6. Developers can write scripts to collect data on theoperation of the system.A divide-by-zero flaw was found in the way SystemTap handled malformeddebugging information in DWARF format. When SystemTap unprivileged mode wasenabled, an unprivileged user in the stapusr group could use this flaw tocrash the system. Additionally, a privileged user (root, or a member of thestapdev group) could trigger this flaw when tricked into instrumenting aspecially-crafted ELF binary, even when unprivileged mode was not enabled.(CVE-2011-1769)SystemTap users should upgrade to these updated packages, which contain abackported patch to correct this issue.