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CVE-2022-2196

Speculative execution attacks in KVM VMX

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.4.233, 5.7.0, 5.8.0, 5.10.170, 5.15.96, and 1 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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).

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • KVM

    From 5.4.47 · fixed in 5.4.233; From 5.6.19 · fixed in 5.7.0; From 5.7.3 · fixed in 5.8.0; From 5.8.0 · fixed in 5.10.170; From 5.11.0 · fixed in 5.15.96; From 5.16.0 · fixed in 6.1.14

References 7

kernel.dance

git.kernel.org

lists.debian.org