CVE-2021-47401
ipack: ipoctal: fix stack information leak
Description
In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix stack information leak The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops). Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice. Fixing the ABI is a separate issue, but this at least plugs the security hole.
INFO
Published Date :
May 21, 2024, 3:15 p.m.
Last Modified :
Sept. 26, 2025, 7:03 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 | HIGH | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the affected packages.
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-2021-47401.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47401 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-2021-47401
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-2021-47401 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47401 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.
-
Reanalysis by [email protected]
Sep. 26, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Removed CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H -
Initial Analysis by [email protected]
Sep. 19, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Added CWE CWE-668 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) 3.5 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/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 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/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 Added Reference https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 Added Reference https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 Added Reference https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 Added Reference https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d Added Reference https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 Added Reference https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c Added Reference https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 -
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 stack information leak The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops). Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice. Fixing the ABI is a separate issue, but this at least plugs the security hole. Added Reference kernel.org https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c [No types assigned]