CVE-2021-4157 Information

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.

CVSS Vector

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

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=2034342 https://lore.kernel.org/lkml/20210517140244.822185482@linuxfoundation.org/ https://security.netapp.com/advisory/ntap-20220602-0007/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.0