CVE-2021-47195
Linux Kernel SPI Mutex Use After Free Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free of the add_lock mutex Commit 6098475d4cb4 ("spi: Fix deadlock when adding SPI controllers on SPI buses") introduced a per-controller mutex. But mutex_unlock() of said lock is called after the controller is already freed: spi_unregister_controller(ctlr) -> put_device(&ctlr->dev) -> spi_controller_release(dev) -> mutex_unlock(&ctrl->add_lock) Move the put_device() after the mutex_unlock().
INFO
Published Date :
April 10, 2024, 7:15 p.m.
Last Modified :
April 19, 2024, 7:16 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-2021-47195
.
URL | Resource |
---|---|
https://git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d | Patch |
https://git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434 | Patch |
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-2021-47195
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47195
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.
-
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 -
Initial Analysis by [email protected]
Apr. 19, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d No Types Assigned https://git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d Patch Changed Reference Type https://git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434 No Types Assigned https://git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434 Patch Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (excluding) 5.15.0 up to (excluding) 5.15.5 -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 10, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free of the add_lock mutex Commit 6098475d4cb4 ("spi: Fix deadlock when adding SPI controllers on SPI buses") introduced a per-controller mutex. But mutex_unlock() of said lock is called after the controller is already freed: spi_unregister_controller(ctlr) -> put_device(&ctlr->dev) -> spi_controller_release(dev) -> mutex_unlock(&ctrl->add_lock) Move the put_device() after the mutex_unlock(). Added Reference kernel.org https://git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434 [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-2021-47195
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-2021-47195
weaknesses.