CVE-2022-48854

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  2. Vulnerabilities (CVE)
  3. CVE-2022-48854

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

I

n the Linux kernel, the following vulnerability has been resolved: net: arc_emac: Fix use after free in arc_mdio_probe() If bus->state is equal to MDIOBUS_ALLOCATED, mdiobus_free(bus) will free the "bus". But bus->name is still used in the next line, which will lead to a use after free. We can fix it by putting the name in a local variable and make the bus->name point to the rodata section "name",then use the name in the error message without referring to bus to avoid the uaf.

References
Link Resource
https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4d Patch
https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3be Patch
https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4d Patch
https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3be Patch
Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

21 Nov 2024, 07:34

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4d - Patch () https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4d - Patch
References () https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3be - Patch () https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3be - Patch

23 Jul 2024, 15:26

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE CWE-416
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
References () https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4d - () https://git.kernel.org/stable/c/84c831803785c2c3bec5c28c0e8a0b72f6b41d4d - Patch
References () https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3be - () https://git.kernel.org/stable/c/bc0e610a6eb0d46e4123fafdbe5e6141d9fff3be - Patch
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: arc_emac: corrige el use after free en arc_mdio_probe() Si bus->state es igual a MDIOBUS_ALLOCATED, mdiobus_free(bus) liberará el "bus". Pero bus->name todavía se usa en la siguiente línea, lo que conducirá a un uso posterior a free. Podemos solucionarlo poniendo el nombre en una variable local y haciendo que bus->nombre apunte a la sección "nombre" de rodata, luego use el nombre en el mensaje de error sin hacer referencia al bus para evitar el uaf.
First Time Linux linux Kernel
Linux

16 Jul 2024, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-07-16 13:15

Updated : 2024-11-21 07:34

NVD link : CVE-2022-48854

Mitre link : CVE-2022-48854

CVE.ORG link : CVE-2022-48854

JSON object : View

Products Affected

linux

CWE
CWE-416

Use After Free