Race condition in the prepare_binprm function in fs/exec.c in the
Linux kernel before 3.19.6 allows local users to gain privileges by
executing a setuid program at a time instant when a chown to root is
in progress, and the ownership is changed but the setuid bit is not
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MLIST:[oss-security] 20150420 Re: Linux: chown() was racy relative to execve() - Linux kernel
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