CVE-2021-47401

  1. Yack CVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47401

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

I

n 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.

References
Link Resource
https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 Patch
https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 Patch
https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 Patch
https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 Patch
https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d Patch
https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 Patch
https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c Patch
https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 Patch
https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 Patch
https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 Patch
https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 Patch
https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 Patch
https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d Patch
https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 Patch
https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c Patch
https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
History

26 Sep 2025, 19:03

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE 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:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux
Linux linux Kernel
CWE CWE-668
References () https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 - () https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 - Patch
References () https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 - () https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 - Patch
References () https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 - () https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 - Patch
References () https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 - () https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 - Patch
References () https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d - () https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d - Patch
References () https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 - () https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 - Patch
References () https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c - () https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c - Patch
References () https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 - () https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 - Patch

21 Nov 2024, 06:36

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ipack: ipoctal: corrige la fuga de información de la pila. El nombre del controlador tty también se usa después de registrar el controlador y específicamente no debe asignarse en la pila para evitar filtrar información al espacio del usuario (o activar un ups). Los controladores no deberían intentar codificar información de topología en el nombre del dispositivo tty, pero este se coló durante la preparación sin que nadie se diera cuenta y desde entonces otro controlador copió esta mala práctica. Arreglar la ABI es un tema aparte, pero esto al menos tapa el agujero de seguridad.
References () https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 - () https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 -
References () https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 - () https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 -
References () https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 - () https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 -
References () https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 - () https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 -
References () https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d - () https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d -
References () https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 - () https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 -
References () https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c - () https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c -
References () https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 - () https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 -

21 May 2024, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-05-21 15:15

Updated : 2025-09-26 19:03

NVD link : CVE-2021-47401

Mitre link : CVE-2021-47401

CVE.ORG link : CVE-2021-47401

JSON object : View

Products Affected

linux

CWE
CWE-668

Exposure of Resource to Wrong Sphere