CVE-2025-38240

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  3. CVE-2025-38240

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: drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr The function mtk_dp_wait_hpd_asserted() may be called before the `mtk_dp->drm_dev` pointer is assigned in mtk_dp_bridge_attach(). Specifically it can be called via this callpath: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe Using "drm" level prints anywhere in this callpath causes a NULL pointer dereference. Change the error message directly in mtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the error messages in mtk_dp_parse_capabilities(), which is called by mtk_dp_wait_hpd_asserted(). While touching these prints, also add the error code to them to make future debugging easier.

References
Link Resource
https://git.kernel.org/stable/c/106a6de46cf4887d535018185ec528ce822d6d84 Patch
https://git.kernel.org/stable/c/13ec849fd2eab808ee8eba2625df7ebea3b85edf Patch
https://git.kernel.org/stable/c/149a5c38436c229950cf1020992ce65c9549bc19 Patch
https://git.kernel.org/stable/c/2fda391ef7a701748abd7fa32232981b522c1e07 Patch
https://git.kernel.org/stable/c/57a9fb47551b33cde7b76d17c0072c3b394f4620 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:*:*:*:*:*:*:*:*
History

06 Nov 2025, 16:22

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-476
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: drm/mediatek: dp: drm_err => dev_err en la ruta HPD para evitar un puntero nulo. La función mtk_dp_wait_hpd_asserted() puede llamarse antes de asignar el puntero `mtk_dp->drm_dev` en mtk_dp_bridge_attach(). Específicamente, se puede llamar a través de esta ruta de llamada: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe El uso de impresiones de nivel "drm" en cualquier parte de esta ruta de llamada provoca una desreferencia del puntero nulo. Cambie el mensaje de error directamente en mtk_dp_wait_hpd_asserted() a dev_err() para evitar esto. Cambie también los mensajes de error en mtk_dp_parse_capabilities(), que es llamado por mtk_dp_wait_hpd_asserted(). Al tocar estas impresiones, agregue también el código de error para facilitar la depuración futura.
References () https://git.kernel.org/stable/c/106a6de46cf4887d535018185ec528ce822d6d84 - () https://git.kernel.org/stable/c/106a6de46cf4887d535018185ec528ce822d6d84 - Patch
References () https://git.kernel.org/stable/c/13ec849fd2eab808ee8eba2625df7ebea3b85edf - () https://git.kernel.org/stable/c/13ec849fd2eab808ee8eba2625df7ebea3b85edf - Patch
References () https://git.kernel.org/stable/c/149a5c38436c229950cf1020992ce65c9549bc19 - () https://git.kernel.org/stable/c/149a5c38436c229950cf1020992ce65c9549bc19 - Patch
References () https://git.kernel.org/stable/c/2fda391ef7a701748abd7fa32232981b522c1e07 - () https://git.kernel.org/stable/c/2fda391ef7a701748abd7fa32232981b522c1e07 - Patch
References () https://git.kernel.org/stable/c/57a9fb47551b33cde7b76d17c0072c3b394f4620 - () https://git.kernel.org/stable/c/57a9fb47551b33cde7b76d17c0072c3b394f4620 - Patch

18 Apr 2025, 07:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-18 07:15

Updated : 2025-11-06 16:22

NVD link : CVE-2025-38240

Mitre link : CVE-2025-38240

CVE.ORG link : CVE-2025-38240

JSON object : View

Products Affected

linux

CWE
CWE-476

NULL Pointer Dereference