CVE-2022-50080

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-50080
In the Linux kernel, the following vulnerability has been resolved: tee: add overflow check in register_shm_helper() With special lengths supplied by user space, register_shm_helper() has an integer overflow when calculating the number of pages covered by a supplied user space memory region. This causes internal_get_user_pages_fast() a helper function of pin_user_pages_fast() to do a NULL pointer dereference: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 Modules linked in: CPU: 1 PID: 173 Comm: optee_example_a Not tainted 5.19.0 #11 Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 pc : internal_get_user_pages_fast+0x474/0xa80 Call trace: internal_get_user_pages_fast+0x474/0xa80 pin_user_pages_fast+0x24/0x4c register_shm_helper+0x194/0x330 tee_shm_register_user_buf+0x78/0x120 tee_ioctl+0xd0/0x11a0 __arm64_sys_ioctl+0xa8/0xec invoke_syscall+0x48/0x114 Fix this by adding an an explicit call to access_ok() in tee_shm_register_user_buf() to catch an invalid user space address early.

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 NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b Patch
https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a Patch
https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053 Patch
https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd Patch
https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2 Patch
https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd Patch
https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1 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:6.0:rc1:*:*:*:*:*:*
History

18 Nov 2025, 02:39

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-476
References () https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b - () https://git.kernel.org/stable/c/2f8e79a1a6128214cb9b205a9869341af5dfb16b - Patch
References () https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a - () https://git.kernel.org/stable/c/573ae4f13f630d6660008f1974c0a8a29c30e18a - Patch
References () https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053 - () https://git.kernel.org/stable/c/578c349570d2a912401963783b36e0ec7a25c053 - Patch
References () https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd - () https://git.kernel.org/stable/c/58c008d4d398f792ca67f35650610864725518fd - Patch
References () https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2 - () https://git.kernel.org/stable/c/965333345fe952cc7eebc8e3a565ffc709441af2 - Patch
References () https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd - () https://git.kernel.org/stable/c/b37e0f17653c00b586cdbcdf0dbca475358ecffd - Patch
References () https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1 - () https://git.kernel.org/stable/c/c12f0e6126ad223806a365084e86370511654bf1 - Patch
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tee: agregar verificación de desbordamiento en register_shm_helper(). Con longitudes especiales suministradas por el espacio de usuario, register_shm_helper() tiene un desbordamiento de entero al calcular la cantidad de páginas cubiertas por una región de memoria del espacio de usuario suministrada. Esto hace que internal_get_user_pages_fast(), una función auxiliar de pin_user_pages_fast(), realice una desreferencia de puntero NULL: No se puede manejar la desreferencia de puntero NULL del núcleo en la dirección virtual 0000000000000010 Módulos vinculados: CPU: 1 PID: 173 Comm: optee_example_a No contaminado 5.19.0 #11 Nombre del hardware: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 pc : internal_get_user_pages_fast+0x474/0xa80 Rastreo de llamadas: internal_get_user_pages_fast+0x474/0xa80 pin_user_pages_fast+0x24/0x4c register_shm_helper+0x194/0x330 tee_shm_register_user_buf+0x78/0x120 tee_ioctl+0xd0/0x11a0 __arm64_sys_ioctl+0xa8/0xec invoke_syscall+0x48/0x114 Solucione esto agregando una llamada explícita a access_ok() en tee_shm_register_user_buf() para detectar de manera temprana una dirección de espacio de usuario no válida.

18 Jun 2025, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-18 11:15

Updated : 2025-11-18 02:39

NVD link : CVE-2022-50080

Mitre link : CVE-2022-50080

CVE.ORG link : CVE-2022-50080

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference