5.5
MEDIUM
CVE-2021-47171
Linux Kernel USB Net Smsc75xx Memory Leak
Description

In the Linux kernel, the following vulnerability has been resolved: net: usb: fix memory leak in smsc75xx_bind Syzbot reported memory leak in smsc75xx_bind(). The problem was is non-freed memory in case of errors after memory allocation. backtrace: [<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline] [<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline] [<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460 [<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728

INFO

Published Date :

March 25, 2024, 10:15 a.m.

Last Modified :

May 16, 2024, 9:15 p.m.

Source :

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

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-47171 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
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-2021-47171.

URL Resource
https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1fa Patch
https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f Patch
https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70 Patch
https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0 Patch
https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95b Patch
https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07 Patch
https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc Patch
https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17 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-2021-47171 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-47171 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. 17, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    May. 16, 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/200dbfcad8011e50c3cec269ed7b980836eeb1fa No Types Assigned https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1fa Patch
    Changed Reference Type https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f No Types Assigned https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f Patch
    Changed Reference Type https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70 No Types Assigned https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70 Patch
    Changed Reference Type https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0 No Types Assigned https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0 Patch
    Changed Reference Type https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95b No Types Assigned https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95b Patch
    Changed Reference Type https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07 No Types Assigned https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07 Patch
    Changed Reference Type https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc No Types Assigned https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc Patch
    Changed Reference Type https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17 No Types Assigned https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17 Patch
    Added CWE NIST CWE-401
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.34 up to (excluding) 4.4.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.235 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.193 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.124 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.42 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.12.9
  • 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

    Mar. 25, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: net: usb: fix memory leak in smsc75xx_bind Syzbot reported memory leak in smsc75xx_bind(). The problem was is non-freed memory in case of errors after memory allocation. backtrace: [<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline] [<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline] [<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460 [<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728
    Added Reference kernel.org https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1fa [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07f [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95b [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70 [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.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-47171 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-2021-47171 weaknesses.

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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