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f5F5F5:K11186236
HistoryApr 19, 2019 - 4:32 p.m.

Linux kernel KVM subsystem vulnerability CVE-2019-6974

2019-04-1916:32:00
support.f5.com
18

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.049 Low

EPSS

Percentile

91.9%

In the Linux kernel before 4.20.8, kvm_ioctl_create_device in virt/kvm/kvm_main.c mishandles reference counting because of a race condition, leading to a use-after-free. (CVE-2019-6974)

Impact

BIG-IP

An attacker may use this vulnerability to cause a vCMP guest to crash, resulting in a denial-of-service or gain privileged access to the vCMP hypervisor host system. This vulnerability affects only hardware platforms that are vCMP-capable and are provisioned for vCMP. For a list of vCMP capable hardware platforms, refer to K14088: vCMP host and compatible guest version matrix.

BIG-IQ, Enterprise Manager, F5 iWorkflow, Traffix SDC

There is no impact; these F5 products are not affected by this vulnerability.

8.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.049 Low

EPSS

Percentile

91.9%