CVE-2021-47403
Linux Kernel Carrier TTY Reference Leak
Description
In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix module reference leak A reference to the carrier module was taken on every open but was only released once when the final reference to the tty struct was dropped. Fix this by taking the module reference and initialising the tty driver data when installing the tty.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
April 2, 2025, 2:52 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.2
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-2021-47403.
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-2021-47403 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47403 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]
Apr. 02, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.14.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.71 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.18 up to (excluding) 4.4.286 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.285 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.249 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.151 Added Reference Type CVE: https://git.kernel.org/stable/c/31398849b84ebae0d43a1cf379cb9895597f221a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/31398849b84ebae0d43a1cf379cb9895597f221a Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/7cea848678470daadbfdaa6a112b823c290f900c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7cea848678470daadbfdaa6a112b823c290f900c Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/811178f296b16af30264def74c8d2179a72d5562 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/811178f296b16af30264def74c8d2179a72d5562 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/9c5b77a7ffc983b2429ce158b50497c5d3c86a69 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9c5b77a7ffc983b2429ce158b50497c5d3c86a69 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/bb8a4fcb2136508224c596a7e665bdba1d7c3c27 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/bb8a4fcb2136508224c596a7e665bdba1d7c3c27 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/c0adb5a947dec6cff7050ec56d78ecd3916f9ce6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c0adb5a947dec6cff7050ec56d78ecd3916f9ce6 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/dde4c1429b97383689f755ce92b4ed1e84a9c92b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/dde4c1429b97383689f755ce92b4ed1e84a9c92b 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/31398849b84ebae0d43a1cf379cb9895597f221a Added Reference https://git.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666 Added Reference https://git.kernel.org/stable/c/7cea848678470daadbfdaa6a112b823c290f900c Added Reference https://git.kernel.org/stable/c/811178f296b16af30264def74c8d2179a72d5562 Added Reference https://git.kernel.org/stable/c/9c5b77a7ffc983b2429ce158b50497c5d3c86a69 Added Reference https://git.kernel.org/stable/c/bb8a4fcb2136508224c596a7e665bdba1d7c3c27 Added Reference https://git.kernel.org/stable/c/c0adb5a947dec6cff7050ec56d78ecd3916f9ce6 Added Reference https://git.kernel.org/stable/c/dde4c1429b97383689f755ce92b4ed1e84a9c92b -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-200 Added CVSS V3.1 CISA-ADP AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H -
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: ipack: ipoctal: fix module reference leak A reference to the carrier module was taken on every open but was only released once when the final reference to the tty struct was dropped. Fix this by taking the module reference and initialising the tty driver data when installing the tty. Added Reference kernel.org https://git.kernel.org/stable/c/31398849b84ebae0d43a1cf379cb9895597f221a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/c0adb5a947dec6cff7050ec56d78ecd3916f9ce6 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/dde4c1429b97383689f755ce92b4ed1e84a9c92b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9c5b77a7ffc983b2429ce158b50497c5d3c86a69 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/3253c87e1e5bc0107aab773af2f135ebccf38666 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7cea848678470daadbfdaa6a112b823c290f900c [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/811178f296b16af30264def74c8d2179a72d5562 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/bb8a4fcb2136508224c596a7e665bdba1d7c3c27 [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-2021-47403 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-2021-47403
weaknesses.