Linux kernel buffer overflow vulnerability (CNVD-2021-54396)

2021-07-1600:00:00

China National Vulnerability Database

www.cnvd.org.cn

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

JSON

Linux kernel is the kernel used by the Linux Foundation’s open source operating system Linux. Linux kernel is vulnerable. The vulnerability stems from the fact that eBPF RINGBUF bpf_ringbuf_reserve does not check if the allocated size is smaller than the ringbuf size. No details of the vulnerability are currently available.