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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
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.
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This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and 5.
It was addressed in Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2009-1081.html .
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http://www.securityfocus.com/archive/1/503610/100/0/threaded [No Types Assigned]
http://www.securityfocus.com/archive/1/archive/1/503610/100/0/threaded [No Types Assigned]
https://exchange.xforce.ibmcloud.com/vulnerabilities/50386 [No Types Assigned]
http://xforce.iss.net/xforce/xfdb/50386 [No Types Assigned]