CVE-2021-46994
CanBus Linux Null Pointer Dereference Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix resume from sleep before interface was brought up Since 8ce8c0abcba3 the driver queues work via priv->restart_work when resuming after suspend, even when the interface was not previously enabled. This causes a null dereference error as the workqueue is only allocated and initialized in mcp251x_open(). To fix this we move the workqueue init to mcp251x_can_probe() as there is no reason to do it later and repeat it whenever mcp251x_open() is called. [mkl: fix error handling in mcp251x_stop()]
INFO
Published Date :
Feb. 28, 2024, 9:15 a.m.
Last Modified :
Dec. 6, 2024, 2:42 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- 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-2021-46994.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-46994 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-2021-46994
weaknesses.
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-2021-46994 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-46994 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]
Dec. 06, 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 Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.38 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.11.22 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.5 Changed Reference Type https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af No Types Assigned https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af Patch Changed Reference Type https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af No Types Assigned https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af Patch Changed Reference Type https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c No Types Assigned https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c Patch Changed Reference Type https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c No Types Assigned https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c Patch Changed Reference Type https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b No Types Assigned https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b Patch Changed Reference Type https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b No Types Assigned https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b Patch Changed Reference Type https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 No Types Assigned https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 Patch Changed Reference Type https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 No Types Assigned https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 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/03c427147b2d3e503af258711af4fc792b89b0af Added Reference https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c Added Reference https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b Added Reference https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 -
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
Feb. 28, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix resume from sleep before interface was brought up Since 8ce8c0abcba3 the driver queues work via priv->restart_work when resuming after suspend, even when the interface was not previously enabled. This causes a null dereference error as the workqueue is only allocated and initialized in mcp251x_open(). To fix this we move the workqueue init to mcp251x_can_probe() as there is no reason to do it later and repeat it whenever mcp251x_open() is called. [mkl: fix error handling in mcp251x_stop()] Added Reference Linux https://git.kernel.org/stable/c/eecb4df8ec9f896b19ee05bfa632ac6c1dcd8f21 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/6f8f1c27b577de15f69fefce3c502bb6300d825c [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/e1e10a390fd9479209c4d834d916ca5e6d5d396b [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/03c427147b2d3e503af258711af4fc792b89b0af [No types assigned]