CVE-2021-47374
Linux Kernel DMA-Debug Printk Spammer Elevated Error Message
Description
In the Linux kernel, the following vulnerability has been resolved: dma-debug: prevent an error message from causing runtime problems For some drivers, that use the DMA API. This error message can be reached several millions of times per second, causing spam to the kernel's printk buffer and bringing the CPU usage up to 100% (so, it should be rate limited). However, since there is at least one driver that is in the mainline and suffers from the error condition, it is more useful to err_printk() here instead of just rate limiting the error message (in hopes that it will make it easier for other drivers that suffer from this issue to be spotted).
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
May 12, 2025, 7:52 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
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-2021-47374.
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-2021-47374 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47374 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]
May. 12, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-770 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to (excluding) 5.14.9 *cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* Added Reference Type CVE: https://git.kernel.org/stable/c/510e1a724ab1bf38150be2c1acabb303f98d0047 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/510e1a724ab1bf38150be2c1acabb303f98d0047 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/de4afec2d2946c92c62a15ab341c70b287289e6a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/de4afec2d2946c92c62a15ab341c70b287289e6a 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/510e1a724ab1bf38150be2c1acabb303f98d0047 Added Reference https://git.kernel.org/stable/c/de4afec2d2946c92c62a15ab341c70b287289e6a -
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: dma-debug: prevent an error message from causing runtime problems For some drivers, that use the DMA API. This error message can be reached several millions of times per second, causing spam to the kernel's printk buffer and bringing the CPU usage up to 100% (so, it should be rate limited). However, since there is at least one driver that is in the mainline and suffers from the error condition, it is more useful to err_printk() here instead of just rate limiting the error message (in hopes that it will make it easier for other drivers that suffer from this issue to be spotted). Added Reference kernel.org https://git.kernel.org/stable/c/de4afec2d2946c92c62a15ab341c70b287289e6a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/510e1a724ab1bf38150be2c1acabb303f98d0047 [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-2021-47374 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-2021-47374
weaknesses.