high
8
CWE
119
Advisory Published
CVE Published
Updated

CVE-2021-4157: Buffer Overflow

First published: Mon May 17 2021(Updated: )

A flaw was found in the Linux kernel. A incorrect size check in decode_nfs_fh() may lead to an overwrite of 2 bytes beyond destination. References: <a href="https://lore.kernel.org/lkml/20210517140244.822185482@linuxfoundation.org/">https://lore.kernel.org/lkml/20210517140244.822185482@linuxfoundation.org/</a>

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:4.18.0-372.9.1.rt7.166.el8
0:4.18.0-372.9.1.rt7.166.el8
redhat/kernel<0:4.18.0-372.9.1.el8
0:4.18.0-372.9.1.el8
redhat/kernel<5.13
5.13
Linux Kernel>=4.0<4.4.269
Linux Kernel>=4.5<4.9.269
Linux Kernel>=4.10<4.14.233
Linux Kernel>=4.15<4.19.191
Linux Kernel>=4.20<5.4.120
Linux Kernel>=5.5<5.10.38
Linux Kernel>=5.11<5.11.22
Linux Kernel>=5.12<5.12.5
Red Hat Fedora=35
All of
NetApp H300E
NetApp H300E Firmware
All of
NetApp H300S Firmware
NetApp H300S Firmware
All of
NetApp H500S Firmware
NetApp H500e Firmware
All of
NetApp H500e Firmware
NetApp H500e Firmware
All of
NetApp H700E
NetApp H700E
All of
NetApp H700S
NetApp H700S
All of
NetApp H410S
NetApp H410S Firmware
Oracle Communications Cloud Native Core Binding Support Function=22.1.1
Oracle Communications Cloud Native Core Binding Support Function=22.1.3
Oracle Communications Cloud Native Core Binding Support Function=22.2.0
NetApp H300E
NetApp H300E Firmware
NetApp H300S Firmware
NetApp H300S Firmware
NetApp H500S Firmware
NetApp H500e Firmware
NetApp H500e Firmware
NetApp H500e Firmware
NetApp H700E
NetApp H700E
NetApp H700S
NetApp H700S
NetApp H410S
NetApp H410S Firmware
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.133-1
6.12.21-1
6.12.22-1

Remedy

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Remedy

https://lore.kernel.org/lkml/20210517140244.822185482@linuxfoundation.org/

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2021-4157?

    CVE-2021-4157 has been classified as a medium severity vulnerability due to the potential for memory corruption leading to arbitrary code execution.

  • How do I fix CVE-2021-4157?

    To remediate CVE-2021-4157, update to the patched version of the Linux kernel as indicated in the vulnerability details.

  • What versions of the Linux kernel are affected by CVE-2021-4157?

    CVE-2021-4157 affects various versions of the Linux kernel, specifically those before 4.18.0-372.9.1.el8 and across several other version ranges.

  • What are the potential consequences of exploiting CVE-2021-4157?

    Exploitation of CVE-2021-4157 may lead to a crash of the affected system or potentially allow an attacker to execute arbitrary code.

  • Is CVE-2021-4157 specific to any distribution of the Linux kernel?

    Yes, CVE-2021-4157 primarily affects Red Hat-based distributions of the Linux kernel, but may impact other distributions that use vulnerable kernel versions.

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