5.6 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
4.7 Medium
CVSS2
Access Vector
Access Complexity
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:C/I:N/A:N
0.002 Low
EPSS
Percentile
54.7%
Problem Description:
On certain Intel 64-bit x86 systems there is a period
of time during terminal fault handling where the CPU may
use speculative execution to try to load data. The CPU may
speculatively access the level 1 data cache (L1D). Data
which would otherwise be protected may then be determined
by using side channel methods.
This issue affects bhyve on FreeBSD/amd64 systems.
Impact:
An attacker executing user code, or kernel code inside
of a virtual machine, may be able to read secret data from
the kernel or from another virtual machine.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
FreeBSD | any | noarch | freebsd-kernel | = 11.2 | UNKNOWN |
FreeBSD | any | noarch | freebsd-kernel | < 11.2_2 | UNKNOWN |
5.6 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
4.7 Medium
CVSS2
Access Vector
Access Complexity
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:C/I:N/A:N
0.002 Low
EPSS
Percentile
54.7%