CVE-2025-21689

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21689
In the Linux kernel, the following vulnerability has been resolved: USB: serial: quatech2: fix null-ptr-deref in qt2_process_read_urb() This patch addresses a null-ptr-deref in qt2_process_read_urb() due to an incorrect bounds check in the following: if (newport > serial->num_ports) { dev_err(&port->dev, "%s - port change to invalid port: %i\n", __func__, newport); break; } The condition doesn't account for the valid range of the serial->port buffer, which is from 0 to serial->num_ports - 1. When newport is equal to serial->num_ports, the assignment of "port" in the following code is out-of-bounds and NULL: serial_priv->current_port = newport; port = serial->port[serial_priv->current_port]; The fix checks if newport is greater than or equal to serial->num_ports indicating it is out-of-bounds.

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/4b9b41fabcd38990f69ef0cee9c631d954a2b530 Patch
https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade Patch
https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe Patch
https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f Patch
https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b Patch
https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507 Patch
https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470 Patch
https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22 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:6.13:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:*
History

21 Feb 2025, 16:36

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
CWE CWE-476
References () https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530 - () https://git.kernel.org/stable/c/4b9b41fabcd38990f69ef0cee9c631d954a2b530 - Patch
References () https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade - () https://git.kernel.org/stable/c/575a5adf48b06a2980c9eeffedf699ed5534fade - Patch
References () https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe - () https://git.kernel.org/stable/c/6068dcff7f19e9fa6fa23ee03453ad6a40fa4efe - Patch
References () https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f - () https://git.kernel.org/stable/c/6377838560c03b36e1153a42ef727533def9b68f - Patch
References () https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b - () https://git.kernel.org/stable/c/8542b33622571f54dfc2a267fce378b6e3840b8b - Patch
References () https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507 - () https://git.kernel.org/stable/c/94770cf7c5124f0268d481886829dc2beecc4507 - Patch
References () https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470 - () https://git.kernel.org/stable/c/f371471708c7d997f763b0e70565026eb67cc470 - Patch
References () https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22 - () https://git.kernel.org/stable/c/fa4c7472469d97c4707698b4c0e098f8cfc2bf22 - Patch
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: USB: serial: quatech2: arreglo de null-ptr-deref en qt2_process_read_urb() Este parche soluciona un null-ptr-deref en qt2_process_read_urb() debido a una comprobación de los límites incorrecta en lo siguiente: if (newport > serial->num_ports) { dev_err(&port->dev, "%s - port change to invalid port: %i\n", __func__, newport); break; } La condición no tiene en cuenta el rango válido del búfer serial->port, que es de 0 a serial->num_ports - 1. Cuando newport es igual a serial->num_ports, la asignación de "port" en el siguiente código está fuera de los límites y es NULL: serial_priv->current_port = newport; port = serial->port[serial_priv->current_port]; La solución verifica si newport es mayor o igual que serial->num_ports, lo que indica que está fuera de los límites.
CPE cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*

10 Feb 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-10 16:15

Updated : 2025-02-21 16:36

NVD link : CVE-2025-21689

Mitre link : CVE-2025-21689

CVE.ORG link : CVE-2025-21689

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference