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.
Published 2022-03-25 19:15:10
Updated 2023-01-17 21:23:11
Source Red Hat, Inc.
View at NVD,   CVE.org
Vulnerability category: Overflow

Exploit prediction scoring system (EPSS) score for CVE-2021-4157

Probability of exploitation activity in the next 30 days: 0.11%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 44 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-4157

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
7.4
HIGH AV:A/AC:M/Au:S/C:C/I:C/A:C
4.4
10.0
NIST
8.0
HIGH CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.1
5.9
NIST

CWE ids for CVE-2021-4157

References for CVE-2021-4157

Products affected by CVE-2021-4157

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