CVE-2025-21808

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  3. CVE-2025-21808

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

I

n the Linux kernel, the following vulnerability has been resolved: net: xdp: Disallow attaching device-bound programs in generic mode Device-bound programs are used to support RX metadata kfuncs. These kfuncs are driver-specific and rely on the driver context to read the metadata. This means they can't work in generic XDP mode. However, there is no check to disallow such programs from being attached in generic mode, in which case the metadata kfuncs will be called in an invalid context, leading to crashes. Fix this by adding a check to disallow attaching device-bound programs in generic mode.

References
Link Resource
https://git.kernel.org/stable/c/3595599fa8360bb3c7afa7ee50c810b4a64106ea Patch
https://git.kernel.org/stable/c/557707906dd3e34b8a8c265f664d19f95799937e Patch
https://git.kernel.org/stable/c/5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1 Patch
https://git.kernel.org/stable/c/b1bc4a35a04cbeb85b6ef5911ec015baa424989f 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:*:*:*:*:*:*:*:*
History

28 Oct 2025, 02:56

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CWE NVD-CWE-noinfo
References () https://git.kernel.org/stable/c/3595599fa8360bb3c7afa7ee50c810b4a64106ea - () https://git.kernel.org/stable/c/3595599fa8360bb3c7afa7ee50c810b4a64106ea - Patch
References () https://git.kernel.org/stable/c/557707906dd3e34b8a8c265f664d19f95799937e - () https://git.kernel.org/stable/c/557707906dd3e34b8a8c265f664d19f95799937e - Patch
References () https://git.kernel.org/stable/c/5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1 - () https://git.kernel.org/stable/c/5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1 - Patch
References () https://git.kernel.org/stable/c/b1bc4a35a04cbeb85b6ef5911ec015baa424989f - () https://git.kernel.org/stable/c/b1bc4a35a04cbeb85b6ef5911ec015baa424989f - Patch
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: xdp: No permitir adjuntar programas vinculados al dispositivo en modo genérico Los programas vinculados al dispositivo se utilizan para admitir las kfuncs de metadatos RX. Estas kfuncs son específicas del controlador y dependen del contexto del controlador para leer los metadatos. Esto significa que no pueden funcionar en modo XDP genérico. Sin embargo, no hay ninguna verificación para no permitir que dichos programas se adjunten en modo genérico, en cuyo caso las kfuncs de metadatos se llamarán en un contexto no válido, lo que provocará fallas. Solucione esto agregando una verificación para no permitir adjuntar programas vinculados al dispositivo en modo genérico.

27 Feb 2025, 20:16

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-27 20:16

Updated : 2025-10-28 02:56

NVD link : CVE-2025-21808

Mitre link : CVE-2025-21808

CVE.ORG link : CVE-2025-21808

JSON object : View

Products Affected

linux

CWE
NVD-CWE-noinfo