The kill_something_info function in kernel/signal.c in the Linux
kernel before 2.6.28 does not consider PID namespaces when processing
signals directed to PID -1, which allows local users to bypass the
intended namespace isolation, and send arbitrary signals to all
processes in all namespaces, via a kill command.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
Disclaimer: The entry creation date may reflect when
the CVE-ID was allocated or reserved, and does not
necessarily indicate when this vulnerability was
discovered, shared with the affected vendor, publicly
disclosed, or updated in CVE.
This is an entry on the CVE
list, which standardizes names for security