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If fs.suid_dumpable=2, then the abrt-addon-ccpp has this bug:

  <http://lwn.net/Articles/503682/>

On the kernel side, this was mitigated by disabling user coredumps in this mode, and I do not see any alternative.

If this mode is active, local users can escalate their privileges to root by abusing the abrt-hook-ccpp user coredump writer.

fs.suid_dumpable=2 is not default, and this mode is generally considered risky.  Therefore, we do not consider this issue a security vulnerability.

This is fixed via BZ#1212820.