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Unrated severityNVD Advisory· Published Jul 25, 2025· Updated Nov 3, 2025

drm/exynos: exynos7_drm_decon: add vblank check in IRQ handling

CVE-2025-38467

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/exynos: exynos7_drm_decon: add vblank check in IRQ handling

If there's support for another console device (such as a TTY serial), the kernel occasionally panics during boot. The panic message and a relevant snippet of the call stack is as follows:

Unable to handle kernel NULL pointer dereference at virtual address 000000000000000 Call trace: drm_crtc_handle_vblank+0x10/0x30 (P) decon_irq_handler+0x88/0xb4 [...]

Otherwise, the panics don't happen. This indicates that it's some sort of race condition.

Add a check to validate if the drm device can handle vblanks before calling drm_crtc_handle_vblank() to avoid this.

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116

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