Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2022-49506

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
26/02/2025
Last modified:
21/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/mediatek: Add vblank register/unregister callback functions<br /> <br /> We encountered a kernel panic issue that callback data will be NULL when<br /> it&amp;#39;s using in ovl irq handler. There is a timing issue between<br /> mtk_disp_ovl_irq_handler() and mtk_ovl_disable_vblank().<br /> <br /> To resolve this issue, we use the flow to register/unregister vblank cb:<br /> - Register callback function and callback data when crtc creates.<br /> - Unregister callback function and callback data when crtc destroies.<br /> <br /> With this solution, we can assure callback data will not be NULL when<br /> vblank is disable.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.12 (including) 5.15.54 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.17.14 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.18 (including) 5.18.3 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools