{"id":"USN-3690-2","summary":"amd64-microcode regression","details":"USN-3690-1 provided updated microcode for AMD processors to address\nCVE-2017-5715 (aka Spectre). Unfortunately, the update caused some\nsystems to fail to boot. This update reverts the update for Ubuntu\n14.04 LTS.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n Jann Horn discovered that microprocessors utilizing speculative execution\n and branch prediction may allow unauthorized memory reads via sidechannel\n attacks. This flaw is known as Spectre. A local attacker could use this to\n expose sensitive information, including kernel memory.\n\n This update provides the microcode updates for AMD 17H family\n processors required for the corresponding Linux kernel updates.\n","modified":"2026-02-10T04:41:22Z","published":"2018-07-05T22:13:21Z","references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3690-2"},{"type":"REPORT","url":"https://launchpad.net/bugs/1779092"}],"affected":[{"package":{"name":"amd64-microcode","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/amd64-microcode@3.20180524.1~ubuntu0.14.04.2+really20130710.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.20180524.1~ubuntu0.14.04.2+really20130710.1"}]}],"versions":["1.20120910-3","2.20131007.1+really20130710.1","3.20180524.1~ubuntu0.14.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.20180524.1~ubuntu0.14.04.2+really20130710.1","binary_name":"amd64-microcode"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-3690-2.json","cves_map":{"cves":[],"ecosystem":"Ubuntu:14.04:LTS"}}}],"schema_version":"1.7.3"}