Pointer Dereference Vulnerability in Linux Kernel Affects Multiple Systems

CVE-2025-71124

What is CVE-2025-71124?

The vulnerability in the Linux kernel arises from a flaw in the drm/msm driver related to the handling of preemption functions. An erroneous placement of the preempt_prepare_postamble() call could lead to attempts to dereference a NULL pointer. This can result in system crashes due to an invalid memory access. By moving the call to preempt_prepare_postamble() after the error check for preempt_postamble_ptr, this patch enhances error handling and prevents potential crashes, thus improving the stability of systems running affected versions of the Linux kernel.

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