CVE-2021-4157: Fedoraproject Fedora

High severity, CVSS 8.0. EPSS: 1.6% chance of exploitation in the next 30 days.

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.

Affected products

• Fedoraproject Fedora: version 35 only
• Linux Linux Kernel: from 4.0, before 4.4.269 (fixed in 4.4.269); from 4.5, before 4.9.269 (fixed in 4.9.269); from 4.10, before 4.14.233 (fixed in 4.14.233); from 4.15, before 4.19.191 (fixed in 4.19.191); from 4.20, before 5.4.120 (fixed in 5.4.120); from 5.5, before 5.10.38 (fixed in 5.10.38); …
• Netapp h300e Firmware: affected versions not specified
• Netapp h300s Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500e Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700e Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Oracle Communications Cloud Native Core Binding Support Function: version 22.1.1 only; version 22.1.3 only; version 22.2.0 only

Published 2022-03-25. Last modified 2026-06-17.