CVE-2021-47348
AMD Display Read-Over Vulnerability (Information Disclosure)
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.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
Yes !
Impact Score :
5.2
Exploitability Score :
3.9
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.
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.
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.
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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]
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.