CVE-2022-2196

Public on 2023-01-09
Modified on 2024-04-22
Description
A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after running L2 due to KVM (L0) advertising eIBRS support to L1. An attacker at L2 with code execution can execute code on an indirect branch on the host machine. We recommend upgrading to Kernel 6.2 or past commit 2e7eab81425a
Severity
Medium severity
Medium
CVSS v3 Base Score
5.6
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 1 kernel Not Affected
Amazon Linux 2 - Core kernel Not Affected
Amazon Linux 2 - Kernel-5.10 Extra kernel 2023-03-17 ALAS2KERNEL-5.10-2023-028 Fixed
Amazon Linux 2 - Kernel-5.15 Extra kernel 2023-03-17 ALAS2KERNEL-5.15-2023-015 Fixed
Amazon Linux 2 - Kernel-5.4 Extra kernel 2023-03-17 ALAS2KERNEL-5.4-2023-043 Fixed
Amazon Linux 2023 kernel 2023-03-11 ALAS2023-2023-127 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.6 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
NVD CVSSv3 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H