"The Spy in the Sandbox -- Practical Cache Attacks in Javascript", by Yossef Oren, Vasileios P. Kemerlis, Simha Sethumadhavan, Angelos D. Keromytis. In http://arxiv.org/abs/1502.07373
While using Javascript and not native code, Oren et al. use a cache side channel to perform a mouse/network activity logger, directly impacting the privacy of users.