CVE-2024-40935

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-40935
In the Linux kernel, the following vulnerability has been resolved: cachefiles: flush all requests after setting CACHEFILES_DEAD In ondemand mode, when the daemon is processing an open request, if the kernel flags the cache as CACHEFILES_DEAD, the cachefiles_daemon_write() will always return -EIO, so the daemon can't pass the copen to the kernel. Then the kernel process that is waiting for the copen triggers a hung_task. Since the DEAD state is irreversible, it can only be exited by closing /dev/cachefiles. Therefore, after calling cachefiles_io_error() to mark the cache as CACHEFILES_DEAD, if in ondemand mode, flush all requests to avoid the above hungtask. We may still be able to read some of the cached data before closing the fd of /dev/cachefiles. Note that this relies on the patch that adds reference counting to the req, otherwise it may UAF.

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

References
Link Resource
https://git.kernel.org/stable/c/320ba9cbca78be79c912143bbba1d1b35ca55cf0 Patch
https://git.kernel.org/stable/c/3bf0b8030296e9ee60d3d4c15849ad9ac0b47081 Patch
https://git.kernel.org/stable/c/85e833cd7243bda7285492b0653c3abb1e2e757b Patch
https://git.kernel.org/stable/c/e73fac95084839c5178d97e81c6a2051251bdc00 Patch
https://git.kernel.org/stable/c/320ba9cbca78be79c912143bbba1d1b35ca55cf0 Patch
https://git.kernel.org/stable/c/3bf0b8030296e9ee60d3d4c15849ad9ac0b47081 Patch
https://git.kernel.org/stable/c/85e833cd7243bda7285492b0653c3abb1e2e757b Patch
https://git.kernel.org/stable/c/e73fac95084839c5178d97e81c6a2051251bdc00 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:6.10:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
History

17 Sep 2025, 15:18

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/320ba9cbca78be79c912143bbba1d1b35ca55cf0 - () https://git.kernel.org/stable/c/320ba9cbca78be79c912143bbba1d1b35ca55cf0 - Patch
References () https://git.kernel.org/stable/c/3bf0b8030296e9ee60d3d4c15849ad9ac0b47081 - () https://git.kernel.org/stable/c/3bf0b8030296e9ee60d3d4c15849ad9ac0b47081 - Patch
References () https://git.kernel.org/stable/c/85e833cd7243bda7285492b0653c3abb1e2e757b - () https://git.kernel.org/stable/c/85e833cd7243bda7285492b0653c3abb1e2e757b - Patch
References () https://git.kernel.org/stable/c/e73fac95084839c5178d97e81c6a2051251bdc00 - () https://git.kernel.org/stable/c/e73fac95084839c5178d97e81c6a2051251bdc00 - Patch
CPE cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
CWE CWE-416
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
First Time Linux linux Kernel
Linux

21 Nov 2024, 09:31

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cachefiles: vacía todas las solicitudes después de configurar CACHEFILES_DEAD En modo bajo demanda, cuando el daemon está procesando una solicitud abierta, si el kernel marca el caché como CACHEFILES_DEAD, cachefiles_daemon_write() siempre devolverá: EIO, por lo que el daemon no puede pasar el copen al kernel. Luego, el proceso del núcleo que está esperando el copen activa una tarea colgada. Dado que el estado DEAD es irreversible, solo se puede salir cerrando /dev/cachefiles. Por lo tanto, después de llamar a cachefiles_io_error() para marcar el caché como CACHEFILES_DEAD, si está en modo bajo demanda, vacíe todas las solicitudes para evitar la tarea suspendida anterior. Es posible que aún podamos leer algunos de los datos almacenados en caché antes de cerrar el fd de /dev/cachefiles. Tenga en cuenta que esto depende del parche que agrega el recuento de referencias al requisito; de lo contrario, puede ser UAF.
References () https://git.kernel.org/stable/c/320ba9cbca78be79c912143bbba1d1b35ca55cf0 - () https://git.kernel.org/stable/c/320ba9cbca78be79c912143bbba1d1b35ca55cf0 -
References () https://git.kernel.org/stable/c/3bf0b8030296e9ee60d3d4c15849ad9ac0b47081 - () https://git.kernel.org/stable/c/3bf0b8030296e9ee60d3d4c15849ad9ac0b47081 -
References () https://git.kernel.org/stable/c/85e833cd7243bda7285492b0653c3abb1e2e757b - () https://git.kernel.org/stable/c/85e833cd7243bda7285492b0653c3abb1e2e757b -
References () https://git.kernel.org/stable/c/e73fac95084839c5178d97e81c6a2051251bdc00 - () https://git.kernel.org/stable/c/e73fac95084839c5178d97e81c6a2051251bdc00 -

12 Jul 2024, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-07-12 13:15

Updated : 2025-09-17 15:18

NVD link : CVE-2024-40935

Mitre link : CVE-2024-40935

CVE.ORG link : CVE-2024-40935

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

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