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5.5
MEDIUM CVSS 3.1
CVE-2021-47172
Linux Kernel IIO ADC Ad7124 Serial Numbering Array Index Out-of-Bounds
Description

In the Linux kernel, the following vulnerability has been resolved: iio: adc: ad7124: Fix potential overflow due to non sequential channel numbers Channel numbering must start at 0 and then not have any holes, or it is possible to overflow the available storage. Note this bug was introduced as part of a fix to ensure we didn't rely on the ordering of child nodes. So we need to support arbitrary ordering but they all need to be there somewhere. Note I hit this when using qemu to test the rest of this series. Arguably this isn't the best fix, but it is probably the most minimal option for backporting etc. Alexandru's sign-off is here because he carried this patch in a larger set that Jonathan then applied.

INFO

Published Date :

March 25, 2024, 10:15 a.m.

Last Modified :

April 30, 2025, 4:35 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2021-47172 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
This information is provided by the 3rd party feeds.
  • Update the affected packages.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-47172.

URL Resource
https://git.kernel.org/stable/c/26da8040eccc6c6b0e415e9a3baf72fd39eb2fdc Patch
https://git.kernel.org/stable/c/f2a772c51206b0c3f262e4f6a3812c89a650191b Patch
https://git.kernel.org/stable/c/f49149964d2423fb618fb6b755bb1eaa431cca2c Patch
https://git.kernel.org/stable/c/f70122825076117787b91e7f219e21c09f11a5b9 Patch
https://git.kernel.org/stable/c/26da8040eccc6c6b0e415e9a3baf72fd39eb2fdc Patch
https://git.kernel.org/stable/c/f2a772c51206b0c3f262e4f6a3812c89a650191b Patch
https://git.kernel.org/stable/c/f49149964d2423fb618fb6b755bb1eaa431cca2c Patch
https://git.kernel.org/stable/c/f70122825076117787b91e7f219e21c09f11a5b9 Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-47172 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-47172 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog() CAPEC-92: Forced Integer Overflow Forced Integer Overflow CAPEC-100: Overflow Buffers Overflow Buffers

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-47172 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2021-47172 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Apr. 30, 2025

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.9 *cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.42 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4.14 up to (excluding) 5.4.124
    Added Reference Type CVE: https://git.kernel.org/stable/c/26da8040eccc6c6b0e415e9a3baf72fd39eb2fdc Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/26da8040eccc6c6b0e415e9a3baf72fd39eb2fdc Types: Patch
    Added Reference Type CVE: https://git.kernel.org/stable/c/f2a772c51206b0c3f262e4f6a3812c89a650191b Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/f2a772c51206b0c3f262e4f6a3812c89a650191b Types: Patch
    Added Reference Type CVE: https://git.kernel.org/stable/c/f49149964d2423fb618fb6b755bb1eaa431cca2c Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/f49149964d2423fb618fb6b755bb1eaa431cca2c Types: Patch
    Added Reference Type CVE: https://git.kernel.org/stable/c/f70122825076117787b91e7f219e21c09f11a5b9 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/f70122825076117787b91e7f219e21c09f11a5b9 Types: Patch
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/26da8040eccc6c6b0e415e9a3baf72fd39eb2fdc
    Added Reference https://git.kernel.org/stable/c/f2a772c51206b0c3f262e4f6a3812c89a650191b
    Added Reference https://git.kernel.org/stable/c/f49149964d2423fb618fb6b755bb1eaa431cca2c
    Added Reference https://git.kernel.org/stable/c/f70122825076117787b91e7f219e21c09f11a5b9
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Nov. 06, 2024

    Action Type Old Value New Value
    Added CWE CISA-ADP CWE-120
    Added CVSS V3.1 CISA-ADP AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 28, 2024

    Action Type Old Value New Value
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Mar. 25, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: iio: adc: ad7124: Fix potential overflow due to non sequential channel numbers Channel numbering must start at 0 and then not have any holes, or it is possible to overflow the available storage. Note this bug was introduced as part of a fix to ensure we didn't rely on the ordering of child nodes. So we need to support arbitrary ordering but they all need to be there somewhere. Note I hit this when using qemu to test the rest of this series. Arguably this isn't the best fix, but it is probably the most minimal option for backporting etc. Alexandru's sign-off is here because he carried this patch in a larger set that Jonathan then applied.
    Added Reference kernel.org https://git.kernel.org/stable/c/f49149964d2423fb618fb6b755bb1eaa431cca2c [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/f70122825076117787b91e7f219e21c09f11a5b9 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/26da8040eccc6c6b0e415e9a3baf72fd39eb2fdc [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/f2a772c51206b0c3f262e4f6a3812c89a650191b [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact