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5.5
MEDIUM CVSS 3.1
CVE-2021-46932
Linux Kernel Appletouch Missing Work Initialization Denial of Service
Description

In the Linux kernel, the following vulnerability has been resolved: Input: appletouch - initialize work before device registration Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device

INFO

Published Date :

Feb. 27, 2024, 10:15 a.m.

Last Modified :

Nov. 21, 2024, 6:34 a.m.

Remotely Exploit :

No

Source :

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

The following products are affected by CVE-2021-46932 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 MEDIUM [email protected]
Solution
This issue can be resolved by updating the affected Linux kernel packages.
  • Update the affected Linux kernel packages.
  • Reboot the system if required.
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-2021-46932.

URL Resource
https://git.kernel.org/stable/c/292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f Patch
https://git.kernel.org/stable/c/975774ea7528b489930b76a77ffc4d5379b95ff2 Patch
https://git.kernel.org/stable/c/9f329d0d6c91142cf0ad08d23c72dd195db2633c Patch
https://git.kernel.org/stable/c/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0 Patch
https://git.kernel.org/stable/c/a02e1404e27855089d2b0a0acc4652c2ce65fe46 Patch
https://git.kernel.org/stable/c/d1962f263a176f493400b8f91bfbf2bfedce951e Patch
https://git.kernel.org/stable/c/d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 Patch
https://git.kernel.org/stable/c/e79ff8c68acb1eddf709d3ac84716868f2a91012 Patch
https://git.kernel.org/stable/c/292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f Patch
https://git.kernel.org/stable/c/975774ea7528b489930b76a77ffc4d5379b95ff2 Patch
https://git.kernel.org/stable/c/9f329d0d6c91142cf0ad08d23c72dd195db2633c Patch
https://git.kernel.org/stable/c/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0 Patch
https://git.kernel.org/stable/c/a02e1404e27855089d2b0a0acc4652c2ce65fe46 Patch
https://git.kernel.org/stable/c/d1962f263a176f493400b8f91bfbf2bfedce951e Patch
https://git.kernel.org/stable/c/d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 Patch
https://git.kernel.org/stable/c/e79ff8c68acb1eddf709d3ac84716868f2a91012 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-2021-46932 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-2021-46932 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-2021-46932 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-2021-46932 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 af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f
    Added Reference https://git.kernel.org/stable/c/975774ea7528b489930b76a77ffc4d5379b95ff2
    Added Reference https://git.kernel.org/stable/c/9f329d0d6c91142cf0ad08d23c72dd195db2633c
    Added Reference https://git.kernel.org/stable/c/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0
    Added Reference https://git.kernel.org/stable/c/a02e1404e27855089d2b0a0acc4652c2ce65fe46
    Added Reference https://git.kernel.org/stable/c/d1962f263a176f493400b8f91bfbf2bfedce951e
    Added Reference https://git.kernel.org/stable/c/d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4
    Added Reference https://git.kernel.org/stable/c/e79ff8c68acb1eddf709d3ac84716868f2a91012
  • 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. 10, 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/292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f No Types Assigned https://git.kernel.org/stable/c/292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f Patch
    Changed Reference Type https://git.kernel.org/stable/c/975774ea7528b489930b76a77ffc4d5379b95ff2 No Types Assigned https://git.kernel.org/stable/c/975774ea7528b489930b76a77ffc4d5379b95ff2 Patch
    Changed Reference Type https://git.kernel.org/stable/c/9f329d0d6c91142cf0ad08d23c72dd195db2633c No Types Assigned https://git.kernel.org/stable/c/9f329d0d6c91142cf0ad08d23c72dd195db2633c Patch
    Changed Reference Type https://git.kernel.org/stable/c/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0 No Types Assigned https://git.kernel.org/stable/c/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0 Patch
    Changed Reference Type https://git.kernel.org/stable/c/a02e1404e27855089d2b0a0acc4652c2ce65fe46 No Types Assigned https://git.kernel.org/stable/c/a02e1404e27855089d2b0a0acc4652c2ce65fe46 Patch
    Changed Reference Type https://git.kernel.org/stable/c/d1962f263a176f493400b8f91bfbf2bfedce951e No Types Assigned https://git.kernel.org/stable/c/d1962f263a176f493400b8f91bfbf2bfedce951e Patch
    Changed Reference Type https://git.kernel.org/stable/c/d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 No Types Assigned https://git.kernel.org/stable/c/d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 Patch
    Changed Reference Type https://git.kernel.org/stable/c/e79ff8c68acb1eddf709d3ac84716868f2a91012 No Types Assigned https://git.kernel.org/stable/c/e79ff8c68acb1eddf709d3ac84716868f2a91012 Patch
    Added CWE NIST CWE-665
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.23 up to (excluding) 4.4.298 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5.0 up to (excluding) 4.9.296 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10.0 up to (excluding) 4.14.261 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15.0 up to (excluding) 4.19.224 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20.0 up to (excluding) 5.4.170 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5.0 up to (excluding) 5.10.90 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11.0 up to (excluding) 5.15.13
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 27, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: Input: appletouch - initialize work before device registration Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device
    Added Reference Linux https://git.kernel.org/stable/c/d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/d1962f263a176f493400b8f91bfbf2bfedce951e [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/a02e1404e27855089d2b0a0acc4652c2ce65fe46 [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/975774ea7528b489930b76a77ffc4d5379b95ff2 [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/9f329d0d6c91142cf0ad08d23c72dd195db2633c [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/e79ff8c68acb1eddf709d3ac84716868f2a91012 [No types assigned]
    Added Reference Linux https://git.kernel.org/stable/c/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0 [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: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact