CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L
AI Score
Confidence
Low
SSVC
Exploitation
none
Automatable
no
Technical Impact
total
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
[
{
"repo": "https://git.kernel.org/",
"vendor": "Linux",
"product": "Linux Kernel",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2e7eab81425a",
"versionType": "git"
},
{
"status": "affected",
"version": "0",
"lessThan": "6.2",
"versionType": "custom"
}
],
"packageName": "KVM",
"defaultStatus": "unaffected"
}
]
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
LOW
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L
AI Score
Confidence
Low
SSVC
Exploitation
none
Automatable
no
Technical Impact
total