CVE-2024-56700

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-56700
In the Linux kernel, the following vulnerability has been resolved: media: wl128x: Fix atomicity violation in fmc_send_cmd() Atomicity violation occurs when the fmc_send_cmd() function is executed simultaneously with the modification of the fmdev->resp_skb value. Consider a scenario where, after passing the validity check within the function, a non-null fmdev->resp_skb variable is assigned a null value. This results in an invalid fmdev->resp_skb variable passing the validity check. As seen in the later part of the function, skb = fmdev->resp_skb; when the invalid fmdev->resp_skb passes the check, a null pointer dereference error may occur at line 478, evt_hdr = (void *)skb->data; To address this issue, it is recommended to include the validity check of fmdev->resp_skb within the locked section of the function. This modification ensures that the value of fmdev->resp_skb does not change during the validation process, thereby maintaining its validity. This possible bug is found by an experimental static analysis tool developed by our team. This tool analyzes the locking APIs to extract function pairs that can be concurrently executed, and then analyzes the instructions in the paired functions to identify possible concurrency bugs including data races and atomicity violations.

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/2e63c908de357048180516b84740ed62dac0b269 Patch
https://git.kernel.org/stable/c/372dc9509122e5d45d4c12978e31c3c7d00aaca4 Patch
https://git.kernel.org/stable/c/378ce4e08ca2b1ac7bbf1d57b68643ca4226c5f8 Patch
https://git.kernel.org/stable/c/3c818ad07e964bca3d27adac1e1f50e1e3c9180e Patch
https://git.kernel.org/stable/c/80a3b2ee01eecf22dfa06968b3cde92c691dea10 Patch
https://git.kernel.org/stable/c/ca59f9956d4519ab18ab2270be47c6b8c6ced091 Patch
https://git.kernel.org/stable/c/d16109c9fdc1b8cea4fe63b42e06e926c3f68990 Patch
https://git.kernel.org/stable/c/d7408a052aa1b4f6fb6f1c7a8877b84017a07ac9 Patch
https://git.kernel.org/stable/c/ed228b74d8a500380150965d5becabf9a1e33141 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:*:*:*:*:*:*:*:*
History

26 Sep 2025, 20:21

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/2e63c908de357048180516b84740ed62dac0b269 - () https://git.kernel.org/stable/c/2e63c908de357048180516b84740ed62dac0b269 - Patch
References () https://git.kernel.org/stable/c/372dc9509122e5d45d4c12978e31c3c7d00aaca4 - () https://git.kernel.org/stable/c/372dc9509122e5d45d4c12978e31c3c7d00aaca4 - Patch
References () https://git.kernel.org/stable/c/378ce4e08ca2b1ac7bbf1d57b68643ca4226c5f8 - () https://git.kernel.org/stable/c/378ce4e08ca2b1ac7bbf1d57b68643ca4226c5f8 - Patch
References () https://git.kernel.org/stable/c/3c818ad07e964bca3d27adac1e1f50e1e3c9180e - () https://git.kernel.org/stable/c/3c818ad07e964bca3d27adac1e1f50e1e3c9180e - Patch
References () https://git.kernel.org/stable/c/80a3b2ee01eecf22dfa06968b3cde92c691dea10 - () https://git.kernel.org/stable/c/80a3b2ee01eecf22dfa06968b3cde92c691dea10 - Patch
References () https://git.kernel.org/stable/c/ca59f9956d4519ab18ab2270be47c6b8c6ced091 - () https://git.kernel.org/stable/c/ca59f9956d4519ab18ab2270be47c6b8c6ced091 - Patch
References () https://git.kernel.org/stable/c/d16109c9fdc1b8cea4fe63b42e06e926c3f68990 - () https://git.kernel.org/stable/c/d16109c9fdc1b8cea4fe63b42e06e926c3f68990 - Patch
References () https://git.kernel.org/stable/c/d7408a052aa1b4f6fb6f1c7a8877b84017a07ac9 - () https://git.kernel.org/stable/c/d7408a052aa1b4f6fb6f1c7a8877b84017a07ac9 - Patch
References () https://git.kernel.org/stable/c/ed228b74d8a500380150965d5becabf9a1e33141 - () https://git.kernel.org/stable/c/ed228b74d8a500380150965d5becabf9a1e33141 - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: wl128x: Se corrige la violación de atomicidad en fmc_send_cmd() La violación de atomicidad ocurre cuando la función fmc_send_cmd() se ejecuta simultáneamente con la modificación del valor fmdev->resp_skb. Considere un escenario donde, después de pasar la verificación de validez dentro de la función, a una variable fmdev->resp_skb no nula se le asigna un valor nulo. Esto da como resultado una variable fmdev->resp_skb no válida que pasa la verificación de validez. Como se ve en la parte posterior de la función, skb = fmdev->resp_skb; cuando la fmdev->resp_skb no válida pasa la verificación, puede ocurrir un error de desreferencia de puntero nulo en la línea 478, evt_hdr = (void *)skb->data; Para solucionar este problema, se recomienda incluir la comprobación de validez de fmdev->resp_skb dentro de la sección bloqueada de la función. Esta modificación garantiza que el valor de fmdev->resp_skb no cambie durante el proceso de validación, manteniendo así su validez. Este posible error se detecta mediante una herramienta de análisis estático experimental desarrollada por nuestro equipo. Esta herramienta analiza las API de bloqueo para extraer pares de funciones que se pueden ejecutar simultáneamente y, a continuación, analiza las instrucciones en las funciones emparejadas para identificar posibles errores de concurrencia, incluidas las ejecucións de datos y las violaciones de atomicidad.
CWE CWE-476
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

28 Dec 2024, 10:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-12-28 10:15

Updated : 2025-09-26 20:21

NVD link : CVE-2024-56700

Mitre link : CVE-2024-56700

CVE.ORG link : CVE-2024-56700

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference