CVE-2022-2196
A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 applying the relevant stable backports (v5.4.233, v5.10.170, v5.15.96, v6.1.14).
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.29% probability · 21th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1188
- Affected
- linux/linux kernel · debian/debian linux
- Source
- cve-coordination@google.com
References
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1b0cafaae8884726c597caded50af185ffc13349
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=63fada296062e91ad9f871970d4e7f19e21a6a15
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6b539a7dbb49250f92515c2ba60aea239efc9e35
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f93a1a5bdcdd122aae0a3eab7a52c15b71fb725b
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2e7eab81425ad6c875f2ed47c0ce01e78afc38a5Mailing List, Patch, Vendor Advisory
- https://kernel.dance/#2e7eab81425aPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlMailing List, Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2e7eab81425ad6c875f2ed47c0ce01e78afc38a5Mailing List, Patch, Vendor Advisory
- https://kernel.dance/#2e7eab81425aPatch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/05/msg00005.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230223-0002/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.