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Date: Thu, 23 Feb 2017 08:46:30 +0100
From: Marcus Meissner <>
To: OSS Security List <>
Subject: util-linux 2.29.2 fixes CVE-2017-2616


util-linux 2.29.2 fixes CVE-2017-2616, a race condition which allowed local users
to kill other processes.

  It is possible for any local user to send SIGKILL to other processes with root
  privileges.  To exploit this, the user must be able to perform su with a
  successful login.  SIGKILL can only be sent to processes which were executed
  after the su process.  It is not possible to send SIGKILL to processes which
  were already running.

Root cause of the flaw that a regular exit of the child process and the su ctrl-c kill of the
child PID could race and so you would be able to later started process with this specific PID.

The fix is here:

Ciao, Marcus

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