High severity · published Jan 9, 2023
CVE-2022-2196
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…
8.8
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.4.47 before 5.4.233; 5.6.19 before 5.7; 5.7.3 before 5.10.170; 5.11 before 5.15.96; 5.16 before 6.1.14 · source: NVD
DL
Debian Linux · Debian
10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-2196
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-2196
git.kernel.org
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=1b0cafaae8884726c597caded50af185ffc13349
git.kernel.org
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=63fada296062e91ad9f871970d4e7f19e21a6a15
git.kernel.org
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=6b539a7dbb49250f92515c2ba60aea239efc9e35
git.kernel.org
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f93a1a5bdcdd122aae0a3eab7a52c15b71fb725b
Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2e7eab81425ad6c875f2ed47c0ce01e78afc38a5
Patch
https://kernel.dance/#2e7eab81425a
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