Potentially if you do not apply the recently released patch here git.kernel.org - linux/kernel/git/torvalds/linux-2.6.git/commit

Security researchers does not warrant immediate action however the level of risks involved should make you think twice. A large percentage of business critical Linux machines today are exposed to the bug.

The Register has more here: Bug exposes eight years of Linux kernel ? The Register

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Update, more here Full Disclosure: Linux NULL pointer dereference due to incorrect proto_ops initializations

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