CVE-2022-49506: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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

Affected products

• Linux Linux Kernel: from 5.12, before 5.15.54 (fixed in 5.15.54); from 5.16, before 5.17.14 (fixed in 5.17.14); from 5.18, before 5.18.3 (fixed in 5.18.3)

Published 2025-02-26. Last modified 2026-06-17.