What is the severity of CVE-2021-47107?

CVE-2021-47107 has been classified as a high severity vulnerability due to the potential for buffer overflow leading to system crashes or arbitrary code execution.

How do I fix CVE-2021-47107?

To fix CVE-2021-47107, update your Linux kernel to a version that includes the patch addressing this vulnerability, specifically versions later than 5.15.12.

What are the affected versions for CVE-2021-47107?

CVE-2021-47107 affects Linux kernel versions from 5.13 up to 5.15.12 and specific release candidates of version 5.16.

What could happen if CVE-2021-47107 is exploited?

If CVE-2021-47107 is exploited, it could lead to a buffer overflow that might allow an attacker to crash the system or execute arbitrary code.

Is CVE-2021-47107 a local or remote vulnerability?

CVE-2021-47107 is considered a remote vulnerability, as it can be triggered by a client sending malicious requests to the server.

Vulnerability/
CVE-2021-47107

high

7.8

CWE

119 120

4/3/2024

14/2/2025

CVE-2021-47107: NFSD: Fix READDIR buffer overflow

First published: Mon Mar 04 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix READDIR buffer overflow If a client sends a READDIR count argument that is too small (say, zero), then the buffer size calculation in the new init_dirlist helper functions results in an underflow, allowing the XDR stream functions to write beyond the actual buffer. This calculation has always been suspect. NFSD has never sanity- checked the READDIR count argument, but the old entry encoders managed the problem correctly. With the commits below, entry encoding changed, exposing the underflow to the pointer arithmetic in xdr_reserve_space(). Modern NFS clients attempt to retrieve as much data as possible for each READDIR request. Also, we have no unit tests that exercise the behavior of READDIR at the lower bound of @count values. Thus this case was missed during testing.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected Software	Affected Version	How to fix
Linux Kernel
Linux Kernel	>=5.13<5.15.12
Linux Kernel	=5.16-rc1
Linux Kernel	=5.16-rc2
Linux Kernel	=5.16-rc3
Linux Kernel	=5.16-rc4
Linux Kernel	=5.16-rc5
Linux Kernel	=5.16-rc6

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-47107?
CVE-2021-47107 has been classified as a high severity vulnerability due to the potential for buffer overflow leading to system crashes or arbitrary code execution.
How do I fix CVE-2021-47107?
To fix CVE-2021-47107, update your Linux kernel to a version that includes the patch addressing this vulnerability, specifically versions later than 5.15.12.
What are the affected versions for CVE-2021-47107?
CVE-2021-47107 affects Linux kernel versions from 5.13 up to 5.15.12 and specific release candidates of version 5.16.
What could happen if CVE-2021-47107 is exploited?
If CVE-2021-47107 is exploited, it could lead to a buffer overflow that might allow an attacker to crash the system or execute arbitrary code.
Is CVE-2021-47107 a local or remote vulnerability?
CVE-2021-47107 is considered a remote vulnerability, as it can be triggered by a client sending malicious requests to the server.

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agent/description
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agent/guess-ai
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agent/software-canonical-lookup-request
agent/tags
agent/weakness
agent/severity
agent/remedy
agent/last-modified-date
agent/softwarecombine
agent/event
collector/nvd-api
source/NVD
vendor/linux
canonical/linux kernel
version/linux kernel/5.13
version/linux kernel/5.16-rc1
version/linux kernel/5.16-rc2
version/linux kernel/5.16-rc3
version/linux kernel/5.16-rc4
version/linux kernel/5.16-rc5
version/linux kernel/5.16-rc6

Frequently Asked Questions

What is the severity of CVE-2021-47107?
CVE-2021-47107 has been classified as a high severity vulnerability due to the potential for buffer overflow leading to system crashes or arbitrary code execution.
How do I fix CVE-2021-47107?
To fix CVE-2021-47107, update your Linux kernel to a version that includes the patch addressing this vulnerability, specifically versions later than 5.15.12.
What are the affected versions for CVE-2021-47107?
CVE-2021-47107 affects Linux kernel versions from 5.13 up to 5.15.12 and specific release candidates of version 5.16.
What could happen if CVE-2021-47107 is exploited?
If CVE-2021-47107 is exploited, it could lead to a buffer overflow that might allow an attacker to crash the system or execute arbitrary code.
Is CVE-2021-47107 a local or remote vulnerability?
CVE-2021-47107 is considered a remote vulnerability, as it can be triggered by a client sending malicious requests to the server.

CVE-2021-47107: NFSD: Fix READDIR buffer overflow

Remedy

Remedy

Remedy

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-47107?

How do I fix CVE-2021-47107?

What are the affected versions for CVE-2021-47107?

What could happen if CVE-2021-47107 is exploited?

Is CVE-2021-47107 a local or remote vulnerability?

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Frequently Asked Questions

What is the severity of CVE-2021-47107?

How do I fix CVE-2021-47107?

What are the affected versions for CVE-2021-47107?

What could happen if CVE-2021-47107 is exploited?

Is CVE-2021-47107 a local or remote vulnerability?