CVE-2025-21947

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  3. CVE-2025-21947

4.7 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

I

n the Linux kernel, the following vulnerability has been resolved: ksmbd: fix type confusion via race condition when using ipc_msg_send_request req->handle is allocated using ksmbd_acquire_id(&ipc_ida), based on ida_alloc. req->handle from ksmbd_ipc_login_request and FSCTL_PIPE_TRANSCEIVE ioctl can be same and it could lead to type confusion between messages, resulting in access to unexpected parts of memory after an incorrect delivery. ksmbd check type of ipc response but missing add continue to check next ipc reponse.

References
Link Resource
https://git.kernel.org/stable/c/1e8833c03a38e1d5d5df6484e3f670a2fd38fb76 Patch
https://git.kernel.org/stable/c/3cb2b2e41541fe6f9cc55ca22d4c0bd260498aea Patch
https://git.kernel.org/stable/c/6321bbda4244b93802d61cfe0887883aae322f4b Patch
https://git.kernel.org/stable/c/76861630b29e51373e73e7b00ad0d467b6941162 Patch
https://git.kernel.org/stable/c/e2ff19f0b7a30e03516e6eb73b948e27a55bc9d2 Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
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:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*
History

03 Nov 2025, 20:17

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html -

10 Apr 2025, 18:05

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ksmbd: se corrige la confusión de tipos mediante una condición de ejecución cuando se usa ipc_msg_send_request. req->handle se asigna usando ksmbd_acquire_id(&ipc_ida), según ida_alloc. req->handle de ksmbd_ipc_login_request y FSCTL_PIPE_TRANSCEIVE ioctl puede ser el mismo y podría generar una confusión de tipos entre mensajes, lo que resulta en el acceso a partes inesperadas de la memoria después de una entrega incorrecta. ksmbd verifica el tipo de respuesta de ipc pero falta agregar continuar para verificar la siguiente respuesta de ipc.
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 4.7
References () https://git.kernel.org/stable/c/1e8833c03a38e1d5d5df6484e3f670a2fd38fb76 - () https://git.kernel.org/stable/c/1e8833c03a38e1d5d5df6484e3f670a2fd38fb76 - Patch
References () https://git.kernel.org/stable/c/3cb2b2e41541fe6f9cc55ca22d4c0bd260498aea - () https://git.kernel.org/stable/c/3cb2b2e41541fe6f9cc55ca22d4c0bd260498aea - Patch
References () https://git.kernel.org/stable/c/6321bbda4244b93802d61cfe0887883aae322f4b - () https://git.kernel.org/stable/c/6321bbda4244b93802d61cfe0887883aae322f4b - Patch
References () https://git.kernel.org/stable/c/76861630b29e51373e73e7b00ad0d467b6941162 - () https://git.kernel.org/stable/c/76861630b29e51373e73e7b00ad0d467b6941162 - Patch
References () https://git.kernel.org/stable/c/e2ff19f0b7a30e03516e6eb73b948e27a55bc9d2 - () https://git.kernel.org/stable/c/e2ff19f0b7a30e03516e6eb73b948e27a55bc9d2 - Patch
CPE cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc4:*:*:*:*:*:*
CWE CWE-362

01 Apr 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-01 16:15

Updated : 2025-11-03 20:17

NVD link : CVE-2025-21947

Mitre link : CVE-2025-21947

CVE.ORG link : CVE-2025-21947

JSON object : View

Products Affected

linux

CWE
CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')