CVE-2022-2196

Speculative execution attacks in KVM VMX

CVSS 5.8 MEDIUMEPSS 0.3%CWE-1188

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.8EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

09 Jan 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

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

Affected products

Linux · Linux Kernel

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References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2e7eab81425ad6c875f2ed47c0ce01e78afc38a5 https://kernel.dance/#2e7eab81425a https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html https://security.netapp.com/advisory/ntap-20230223-0002/