CVE-2025-21804

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21804
In the Linux kernel, the following vulnerability has been resolved: PCI: rcar-ep: Fix incorrect variable used when calling devm_request_mem_region() The rcar_pcie_parse_outbound_ranges() uses the devm_request_mem_region() macro to request a needed resource. A string variable that lives on the stack is then used to store a dynamically computed resource name, which is then passed on as one of the macro arguments. This can lead to undefined behavior. Depending on the current contents of the memory, the manifestations of errors may vary. One possible output may be as follows: $ cat /proc/iomem 30000000-37ffffff : 38000000-3fffffff : Sometimes, garbage may appear after the colon. In very rare cases, if no NULL-terminator is found in memory, the system might crash because the string iterator will overrun which can lead to access of unmapped memory above the stack. Thus, fix this by replacing outbound_name with the name of the previously requested resource. With the changes applied, the output will be as follows: $ cat /proc/iomem 30000000-37ffffff : memory2 38000000-3fffffff : memory3 [kwilczynski: commit log]

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/24576899c49509c0d533bcf569139f691d8f7af7 Patch
https://git.kernel.org/stable/c/2c54b9fca1755e80a343ccfde0652dc5ea4744b2 Patch
https://git.kernel.org/stable/c/2d2da5a4c1b4509f6f7e5a8db015cd420144beb4 Patch
https://git.kernel.org/stable/c/44708208c2a4b828a57a2abe7799c9d3962e7eaa Patch
https://git.kernel.org/stable/c/6987e021b64cbb49981d140bb72d9d1466f191c4 Patch
https://git.kernel.org/stable/c/7a47e14c5fb0b6dba7073be7b0119fb8fe864e01 Patch
https://git.kernel.org/stable/c/9ff46b0bfeb6e0724a4ace015aa7a0b887cdb7c1 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:*:*:*:*:*:*:*:*
History

28 Oct 2025, 02:59

Type Values Removed Values Added
CWE CWE-476
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/24576899c49509c0d533bcf569139f691d8f7af7 - () https://git.kernel.org/stable/c/24576899c49509c0d533bcf569139f691d8f7af7 - Patch
References () https://git.kernel.org/stable/c/2c54b9fca1755e80a343ccfde0652dc5ea4744b2 - () https://git.kernel.org/stable/c/2c54b9fca1755e80a343ccfde0652dc5ea4744b2 - Patch
References () https://git.kernel.org/stable/c/2d2da5a4c1b4509f6f7e5a8db015cd420144beb4 - () https://git.kernel.org/stable/c/2d2da5a4c1b4509f6f7e5a8db015cd420144beb4 - Patch
References () https://git.kernel.org/stable/c/44708208c2a4b828a57a2abe7799c9d3962e7eaa - () https://git.kernel.org/stable/c/44708208c2a4b828a57a2abe7799c9d3962e7eaa - Patch
References () https://git.kernel.org/stable/c/6987e021b64cbb49981d140bb72d9d1466f191c4 - () https://git.kernel.org/stable/c/6987e021b64cbb49981d140bb72d9d1466f191c4 - Patch
References () https://git.kernel.org/stable/c/7a47e14c5fb0b6dba7073be7b0119fb8fe864e01 - () https://git.kernel.org/stable/c/7a47e14c5fb0b6dba7073be7b0119fb8fe864e01 - Patch
References () https://git.kernel.org/stable/c/9ff46b0bfeb6e0724a4ace015aa7a0b887cdb7c1 - () https://git.kernel.org/stable/c/9ff46b0bfeb6e0724a4ace015aa7a0b887cdb7c1 - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

13 Mar 2025, 13:15

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: PCI: rcar-ep: Se corrige la variable incorrecta utilizada al llamar a devm_request_mem_region(). rcar_pcie_parse_outbound_ranges() utiliza la macro devm_request_mem_region() para solicitar un recurso necesario. Luego, se utiliza una variable de cadena que se encuentra en la pila para almacenar un nombre de recurso calculado dinámicamente, que luego se pasa como uno de los argumentos de la macro. Esto puede provocar un comportamiento indefinido. Según el contenido actual de la memoria, las manifestaciones de los errores pueden variar. Una posible salida puede ser la siguiente: $ cat /proc/iomem 30000000-37ffffff : 38000000-3fffffff : A veces, puede aparecer basura después de los dos puntos. En casos muy raros, si no se encuentra un terminador NULL en la memoria, el sistema puede bloquearse porque el iterador de cadena se desbordará, lo que puede provocar el acceso a la memoria no asignada por encima de la pila. Por lo tanto, solucione este problema reemplazando outbound_name con el nombre del recurso solicitado anteriormente. Con los cambios aplicados, el resultado será el siguiente: $ cat /proc/iomem 30000000-37ffffff : memory2 38000000-3fffffff : memory3 [kwilczynski: commit log]
References
  • () https://git.kernel.org/stable/c/6987e021b64cbb49981d140bb72d9d1466f191c4 -
  • () https://git.kernel.org/stable/c/7a47e14c5fb0b6dba7073be7b0119fb8fe864e01 -

27 Feb 2025, 20:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-27 20:16

Updated : 2025-10-28 02:59

NVD link : CVE-2025-21804

Mitre link : CVE-2025-21804

CVE.ORG link : CVE-2025-21804

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference