CVE-2021-4157

CVE Details

Release Date:	2022-03-25
Impact:	None	What is this?

Description

An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system.

See more information about CVE-2021-4157 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	8.0
Vector String:	CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Version:	3.0
Attack Vector:	Adjacent_Network
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	High
Integrity Impact:	High
Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2022-9348	2022-05-03
Oracle Linux version 7 (kernel-uek)	ELSA-2022-9348	2022-05-03
Oracle Linux version 8 (kernel)	ELSA-2022-1988	2022-05-17
Oracle VM version 3 (kernel-uek)	OVMSA-2022-0014	2022-05-03