Ubuntu Security Notice 6346-1 - Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information. 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.
e422ea5f7081bc0200e85b80da4c8a9f6df414eaf7dc501f340da0bb9e378a29