Ubuntu Security Notice 3597-1 - USNS 3541-1 and 3523-1 provided mitigations for Spectre and Meltdown for the i386, amd64, and ppc64el architectures in Ubuntu 17.10. This update provides the corresponding mitigations for the arm64 architecture. Jann Horn discovered that microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized memory reads via sidechannel attacks. This flaw is known as Meltdown. A local attacker could use this to expose sensitive information, including kernel memory. Various other issues were also addressed.
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