CVE-2021-47642

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47642
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow Coverity complains of a possible buffer overflow. However, given the 'static' scope of nvidia_setup_i2c_bus() it looks like that can't happen after examiniing the call sites. CID 19036 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW) 1. fixed_size_dest: You might overrun the 48-character fixed-size string chan->adapter.name by copying name without checking the length. 2. parameter_as_source: Note: This defect has an elevated risk because the source argument is a parameter of the current function. 89 strcpy(chan->adapter.name, name); Fix this warning by using strscpy() which will silence the warning and prevent any future buffer overflows should the names used to identify the channel become much longer.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/055cdd2e7b992921424d4daaa285ced787fb205f Patch
https://git.kernel.org/stable/c/08dff482012758935c185532b1ad7d584785a86e Patch
https://git.kernel.org/stable/c/37a1a2e6eeeb101285cd34e12e48a881524701aa Patch
https://git.kernel.org/stable/c/41baa86b6c802cdc6ab8ff2d46c083c9be93de81 Patch
https://git.kernel.org/stable/c/47e5533adf118afaf06d25a3e2aaaab89371b1c5 Patch
https://git.kernel.org/stable/c/580e5d3815474b8349250c25c16416585a72c7fe Patch
https://git.kernel.org/stable/c/6a5226e544ac043bb2d8dc1bfe8920d02282f7cd Patch
https://git.kernel.org/stable/c/72dd5c46a152136712a55bf026a9aa8c1b12b60d Patch
https://git.kernel.org/stable/c/9ff2f7294ab0f011cd4d1b7dcd9a07d8fdf72834 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:*:*:*:*:*:*:*:*
History

23 Sep 2025, 18:46

Type Values Removed Values Added
CWE CWE-787
First Time Linux
Linux linux Kernel
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: video: fbdev: nvidiafb: Use strscpy() para evitar el desbordamiento del búfer Coverity se queja de un posible desbordamiento del búfer. Sin embargo, dado el alcance 'estático' de nvidia_setup_i2c_bus(), parece que eso no puede suceder después de examinar los sitios de llamada. CID 19036 (#1 de 1): Copiar en un búfer de tamaño fijo (STRING_OVERFLOW) 1. fixed_size_dest: Puede desbordar la cadena de tamaño fijo de 48 caracteres chan->adapter.name copiando name sin verificar la longitud. 2. parameter_as_source: Nota: Este defecto tiene un riesgo elevado porque el argumento source es un parámetro de la función actual. 89 strcpy(chan->adapter.name, name); Corrija esta advertencia usando strscpy() que silenciará la advertencia y evitará futuros desbordamientos del búfer si los nombres utilizados para identificar el canal se vuelven mucho más largos.
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
References () https://git.kernel.org/stable/c/055cdd2e7b992921424d4daaa285ced787fb205f - () https://git.kernel.org/stable/c/055cdd2e7b992921424d4daaa285ced787fb205f - Patch
References () https://git.kernel.org/stable/c/08dff482012758935c185532b1ad7d584785a86e - () https://git.kernel.org/stable/c/08dff482012758935c185532b1ad7d584785a86e - Patch
References () https://git.kernel.org/stable/c/37a1a2e6eeeb101285cd34e12e48a881524701aa - () https://git.kernel.org/stable/c/37a1a2e6eeeb101285cd34e12e48a881524701aa - Patch
References () https://git.kernel.org/stable/c/41baa86b6c802cdc6ab8ff2d46c083c9be93de81 - () https://git.kernel.org/stable/c/41baa86b6c802cdc6ab8ff2d46c083c9be93de81 - Patch
References () https://git.kernel.org/stable/c/47e5533adf118afaf06d25a3e2aaaab89371b1c5 - () https://git.kernel.org/stable/c/47e5533adf118afaf06d25a3e2aaaab89371b1c5 - Patch
References () https://git.kernel.org/stable/c/580e5d3815474b8349250c25c16416585a72c7fe - () https://git.kernel.org/stable/c/580e5d3815474b8349250c25c16416585a72c7fe - Patch
References () https://git.kernel.org/stable/c/6a5226e544ac043bb2d8dc1bfe8920d02282f7cd - () https://git.kernel.org/stable/c/6a5226e544ac043bb2d8dc1bfe8920d02282f7cd - Patch
References () https://git.kernel.org/stable/c/72dd5c46a152136712a55bf026a9aa8c1b12b60d - () https://git.kernel.org/stable/c/72dd5c46a152136712a55bf026a9aa8c1b12b60d - Patch
References () https://git.kernel.org/stable/c/9ff2f7294ab0f011cd4d1b7dcd9a07d8fdf72834 - () https://git.kernel.org/stable/c/9ff2f7294ab0f011cd4d1b7dcd9a07d8fdf72834 - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

26 Feb 2025, 06:37

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 06:37

Updated : 2025-09-23 18:46

NVD link : CVE-2021-47642

Mitre link : CVE-2021-47642

CVE.ORG link : CVE-2021-47642

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-787

Out-of-bounds Write