CVE-2022-49661

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49661
In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_open/close(): fix memory leak The gs_usb driver appears to suffer from a malady common to many USB CAN adapter drivers in that it performs usb_alloc_coherent() to allocate a number of USB request blocks (URBs) for RX, and then later relies on usb_kill_anchored_urbs() to free them, but this doesn't actually free them. As a result, this may be leaking DMA memory that's been used by the driver. This commit is an adaptation of the techniques found in the esd_usb2 driver where a similar design pattern led to a memory leak. It explicitly frees the RX URBs and their DMA memory via a call to usb_free_coherent(). Since the RX URBs were allocated in the gs_can_open(), we remove them in gs_can_close() rather than in the disconnect function as was done in esd_usb2. For more information, see the 928150fad41b ("can: esd_usb2: fix memory leak").

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/0e60230bc64355c80abe993d1719fdb318094e20 Patch
https://git.kernel.org/stable/c/2bda24ef95c0311ab93bda00db40486acf30bd0a Patch
https://git.kernel.org/stable/c/339fa9f80d3b94177a7a459c6d115d3b56007d5a Patch
https://git.kernel.org/stable/c/6f655b5e13fa4b27e915b6c209ac0da74fd75963 Patch
https://git.kernel.org/stable/c/c1d806bc29ff7ffe0e2a023583c8720ed96cb0b0 Patch
https://git.kernel.org/stable/c/d0b8e223998866b3e7b2895927d4e9689b0a80d8 Patch
https://git.kernel.org/stable/c/d91492638b054f4a359621ef216242be5973ed6b Patch
https://git.kernel.org/stable/c/ffb6cc6601ec7c8fa963dcf76025df4a02f2cf5c 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:5.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*
History

23 Oct 2025, 15:49

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: gs_usb: gs_usb_open/close(): corrige pérdida de memoria El controlador gs_usb parece sufrir un problema común a muchos controladores de adaptadores USB CAN, ya que realiza usb_alloc_coherent() para asignar una cantidad de bloques de solicitud USB (URB) para RX y luego se basa en usb_kill_anchored_urbs() para liberarlos, pero esto en realidad no los libera. Como resultado, esto puede estar perdiendo memoria DMA que ha sido utilizada por el controlador. Esta confirmación es una adaptación de las técnicas encontradas en el controlador esd_usb2 donde un patrón de diseño similar condujo a una pérdida de memoria. Libera explícitamente los URB RX y su memoria DMA a través de una llamada a usb_free_coherent(). Dado que los URB RX se asignaron en gs_can_open(), los eliminamos en gs_can_close() en lugar de en la función de desconexión como se hizo en esd_usb2. Para obtener más información, consulte 928150fad41b ("can: esd_usb2: reparar pérdida de memoria").
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-401
References () https://git.kernel.org/stable/c/0e60230bc64355c80abe993d1719fdb318094e20 - () https://git.kernel.org/stable/c/0e60230bc64355c80abe993d1719fdb318094e20 - Patch
References () https://git.kernel.org/stable/c/2bda24ef95c0311ab93bda00db40486acf30bd0a - () https://git.kernel.org/stable/c/2bda24ef95c0311ab93bda00db40486acf30bd0a - Patch
References () https://git.kernel.org/stable/c/339fa9f80d3b94177a7a459c6d115d3b56007d5a - () https://git.kernel.org/stable/c/339fa9f80d3b94177a7a459c6d115d3b56007d5a - Patch
References () https://git.kernel.org/stable/c/6f655b5e13fa4b27e915b6c209ac0da74fd75963 - () https://git.kernel.org/stable/c/6f655b5e13fa4b27e915b6c209ac0da74fd75963 - Patch
References () https://git.kernel.org/stable/c/c1d806bc29ff7ffe0e2a023583c8720ed96cb0b0 - () https://git.kernel.org/stable/c/c1d806bc29ff7ffe0e2a023583c8720ed96cb0b0 - Patch
References () https://git.kernel.org/stable/c/d0b8e223998866b3e7b2895927d4e9689b0a80d8 - () https://git.kernel.org/stable/c/d0b8e223998866b3e7b2895927d4e9689b0a80d8 - Patch
References () https://git.kernel.org/stable/c/d91492638b054f4a359621ef216242be5973ed6b - () https://git.kernel.org/stable/c/d91492638b054f4a359621ef216242be5973ed6b - Patch
References () https://git.kernel.org/stable/c/ffb6cc6601ec7c8fa963dcf76025df4a02f2cf5c - () https://git.kernel.org/stable/c/ffb6cc6601ec7c8fa963dcf76025df4a02f2cf5c - Patch
CPE cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux
Linux linux Kernel

26 Feb 2025, 07:01

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 07:01

Updated : 2025-10-23 15:49

NVD link : CVE-2022-49661

Mitre link : CVE-2022-49661

CVE.ORG link : CVE-2022-49661

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime