1. Home
  2. Vulnerabilities
  3. CVE-2021-47348
9.1
CRITICAL CVSS 3.1
CVE-2021-47348
drm/amd/display: Avoid HDCP over-read and corruption
Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid HDCP over-read and corruption Instead of reading the desired 5 bytes of the actual target field, the code was reading 8. This could result in a corrupted value if the trailing 3 bytes were non-zero, so instead use an appropriately sized and zero-initialized bounce buffer, and read only 5 bytes before casting to u64.

INFO

Published Date :

May 21, 2024, 3:15 p.m.

Last Modified :

April 2, 2025, 2:30 p.m.

Remotely Exploit :

Yes !

Source :

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

The following products are affected by CVE-2021-47348 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 CRITICAL 134c704f-9b21-4f2e-91b3-4a467353bcc0
Solution
This information is provided by the 3rd party feeds.
  • There is no known solution at this time.
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-2021-47348.

URL Resource
https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2 Patch
https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f Patch
https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f Patch
https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e Patch
https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2 Patch
https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f Patch
https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f Patch
https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e 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-2021-47348 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-2021-47348 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-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

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-2021-47348 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-2021-47348 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. 02, 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) 5.12.18 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.13 up to (excluding) 5.13.3 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.10.51
    Added Reference Type CVE: https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2 Types: Patch
    Added Reference Type CVE: https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f Types: Patch
    Added Reference Type CVE: https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f Types: Patch
    Added Reference Type CVE: https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e 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/06888d571b513cbfc0b41949948def6cb81021b2
    Added Reference https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f
    Added Reference https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f
    Added Reference https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jul. 03, 2024

    Action Type Old Value New Value
    Added CWE CISA-ADP CWE-119
    Added CVSS V3.1 CISA-ADP AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 28, 2024

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

    May. 21, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid HDCP over-read and corruption Instead of reading the desired 5 bytes of the actual target field, the code was reading 8. This could result in a corrupted value if the trailing 3 bytes were non-zero, so instead use an appropriately sized and zero-initialized bounce buffer, and read only 5 bytes before casting to u64.
    Added Reference kernel.org https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2 [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: 9.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact