In the Linux kernel, the following vulnerability has been resolved: wifi: rtlwifi: remove unused check_buddy_priv Commit 2461c7d60f9f ("rtlwifi: Update header file") introduced a global list of private data structures. Later on, commit 26634c4b1868 ("rtlwifi Modify existing bits to match vendor version 2013.02.07") started adding the private data to that list at probe time and added a hook, check_buddy_priv to find the private data from a similar device. However, that function was never used. Besides, though there is a lock for that list, it is never used. And when the probe fails, the private data is never removed from the list. This would cause a second probe to access freed memory. Remove the unused hook, structures and members, which will prevent the potential race condition on the list and its corruption during a second probe when probe fails.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: rtlwifi: eliminar check_buddy_priv no utilizado el commit 2461c7d60f9f ("rtlwifi: Actualizar archivo de encabezado") introdujo una lista global de estructuras de datos privados. Más tarde, el commit 26634c4b1868 ("rtlwifi Modificar bits existentes para que coincidan con la versión del proveedor 2013.02.07") comenzó a agregar los datos privados a esa lista en el momento del sondeo y agregó un gancho, check_buddy_priv para encontrar los datos privados de un dispositivo similar. Sin embargo, esa función nunca se usó. Además, aunque hay un bloqueo para esa lista, nunca se usa. Y cuando el sondeo falla, los datos privados nunca se eliminan de la lista. Esto haría que un segundo sondeo acceda a la memoria liberada. Elimine el gancho, las estructuras y los miembros no utilizados, lo que evitará la posible condición de ejecución en la lista y su corrupción durante un segundo sondeo cuando el sondeo falla.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-416
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3843e5d40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3843e5240> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2d8276440> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd368472500> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3843e53c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3843e47c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd34bb29b00> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |