Linux kernel conditional contention vulnerability (CNVD-2023-71721)

2023-09-1200:00:00

China National Vulnerability Database

www.cnvd.org.cn

linux kernel

conditional contention vulnerability

kvm

secure encrypted virtualization (sev)

amd processor

denial of service

5.6 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

1 Low

CVSS2

Access Vector

LOCAL

Access Complexity

HIGH

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:H/Au:S/C:N/I:N/A:P

0.0004 Low

EPSS

Percentile

7.3%

JSON

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. The Linux kernel suffers from a conditional contention vulnerability, which arises from a KVM in the Linux kernel with Secure Encrypted Virtualization (SEV) (AMD processor) containing a contention condition when accessing a GHCB page, which can be exploited by an attacker to cause a denial of service.