Published: 08 June 2021

Observable timing discrepancy in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.

From the Ubuntu security team

Travis Downs discovered that some Intel processors did not properly flush cache-lines for trivial-data values. This may allow an unauthorized user to infer the presence of these trivial-data-cache-lines via timing sidechannel attacks. A local attacker could use this to expose sensitive information.



CVSS 3 base score: 2.8


Package Release Status
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.10 (Impish Indri)
Released (3.20210608.0ubuntu1)
Ubuntu 21.04 (Hirsute Hippo)
Released (3.20210608.0ubuntu0.21.04.1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (3.20210608.0ubuntu0.20.04.1)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (3.20210608.0ubuntu0.18.04.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (3.20210608.0ubuntu0.16.04.1+esm1)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.20210608.0ubuntu0.14.04.1+esm1)