CVE-2020-10767
Public on 2020-07-14
Modified on 2020-07-21
Description
A flaw was found in the Linux kernel’s implementation of the Enhanced IBPB (Indirect Branch Prediction Barrier). The IBPB mitigation will be disabled when STIBP is not available or when the Enhanced Indirect Branch Restricted Speculation (IBRS) is available. This flaw allows a local attacker to perform a Spectre V2 style attack when this configuration is active. The highest threat from this vulnerability is to confidentiality.
Severity
Important
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 1 | kernel | 2020-07-14 | ALAS-2020-1401 | Fixed |
| Amazon Linux 2 - Core | kernel | 2020-07-21 | ALAS2-2020-1465 | Fixed |
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | 2022-01-20 | ALAS2KERNEL-5.4-2022-013 | Fixed |
| Amazon Linux 2 - Livepatch Extra | kernel-livepatch-4.14.181-142.260 | 2020-09-04 | ALAS2LIVEPATCH-2020-025 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | CVSSv2 | 1.9 | AV:L/AC:M/Au:N/C:P/I:N/A:N |
| NVD | CVSSv3 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |