LXer: Patch now: This serious Linux vulnerability affects nearly all distributions
 

Published at LXer:

Qualys has discovered a nasty security hole, dubbed [he]#039[/he]Looney Tunables[he]#039[/he], in the glibc C library. This means almost all Linux distributions have a bad security problem.

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That's about a week out of date, most distros have already patched it.