Tavis Ormandy discovered that some AMD processors did not properly handle speculative execution of certain vector register instructions. A local attacker could use this to expose sensitive information.
3.20191218.1ubuntu1.13.20191218.1ubuntu2.13.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm13.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm1