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Unrated severityNVD Advisory· Published May 22, 2024· Updated May 4, 2025

drm: mxsfb: Fix NULL pointer dereference crash on unload

CVE-2021-47471

Description

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

drm: mxsfb: Fix NULL pointer dereference crash on unload

The mxsfb->crtc.funcs may already be NULL when unloading the driver, in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from mxsfb_unload() leads to NULL pointer dereference.

Since all we care about is masking the IRQ and mxsfb->base is still valid, just use that to clear and mask the IRQ.

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Affected products

101

Patches

Vulnerability mechanics

References

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