In the Linux kernel, the following vulnerability has been resolved: clk: Fix clk_core_get NULL dereference It is possible for clk_core_get to dereference a NULL in the following sequence: clk_core_get() of_clk_get_hw_from_clkspec() __of_clk_get_hw_from_provider() __clk_get_hw() __clk_get_hw() can return NULL which is dereferenced by clk_core_get() at hw->core. Prior to commit dde4eff47c82 ("clk: Look for parents with clkdev based clk_lookups") the check IS_ERR_OR_NULL() was performed which would have caught the NULL. Reading the description of this function it talks about returning NULL but that cannot be so at the moment. Update the function to check for hw before dereferencing it and return NULL if hw is NULL.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clk: corrige la desreferencia de clk_core_get NULL Es posible que clk_core_get elimine la referencia a un NULL en la siguiente secuencia: clk_core_get() of_clk_get_hw_from_clkspec() __of_clk_get_hw_from_provider() __clk_get_hw() __clk_get_hw() puede devolver NULL que es desreferenciado por clk_core_get() en hw->core. Antes de confirmar dde4eff47c82 ("clk: buscar padres con clk_lookups basado en clkdev") se realizó la verificación IS_ERR_OR_NULL() que habría detectado el NULL. Leyendo la descripción de esta función se habla de devolver NULL pero eso no puede ser así por el momento. Actualice la función para verificar hw antes de eliminar la referencia y devuelva NULL si hw es NULL.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-476
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd340a8f900> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd34927cf00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2dbc7ac40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36a0db280> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd340a8f080> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd340a8c4c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd341240780> | Operating System |
| debian | debian_linux | 10.0 | <built-in method update of dict object at 0x7fd38492bc00> | 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:*:*:*:*:*:*:*:* |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |