CVE-2022-2196

Vulnerability overview

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 applying the relevant stable backports (v5.4.233, v5.10.170, v5.15.96, v6.1.14).

Affected product and versions

Product

Linux Linux Kernel, linux kernel, debian linux

Affected versions

>= 64b8f33b2e1e687d465b5cb382e7bec495f1e026 < f93a1a5bdcdd122aae0a3eab7a52c15b71fb725b, >= e089a83fbc55b8057f332c00f125acaa02b08ef7 < 2e7eab81425ad6c875f2ed47c0ce01e78afc38a5, >= 02a3868d18fe639363f1cea6e6d7914513198e43 < 2e7eab81425ad6c875f2ed47c0ce01e78afc38a5, >= 5c911beff20aa8639e7a1f28988736c13e03ed54 < 1b0cafaae8884726c597caded50af185ffc13349, >= 5c911beff20aa8639e7a1f28988736c13e03ed54 < 6b539a7dbb49250f92515c2ba60aea239efc9e35, >= 5c911beff20aa8639e7a1f28988736c13e03ed54 < 63fada296062e91ad9f871970d4e7f19e21a6a15, >= 5c911beff20aa8639e7a1f28988736c13e03ed54 < 2e7eab81425ad6c875f2ed47c0ce01e78afc38a5, >= 5.4.47 < 5.4.233, >= 5.6.19 < 5.7.0, >= 5.7.3 < 5.8.0, >= 5.8.0 < 5.10.170, >= 5.11.0 < 5.15.96, >= 5.16.0 < 6.1.14, >= 5.6.19 < 5.7, >= 5.7.3 < 5.10.170, >= 5.11 < 5.15.96, >= 5.16 < 6.1.14, 10.0

Fixed versions

5.4.233, 5.7, 5.10.170, 5.15.96, 6.1.14

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE

CWE-1188