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The MSM KGSL graphics driver in Linux kernel 3.x mishandles the KGSL_MEMFLAGS_GPUREADONLY flag. The defect can create unintended read-write GPU memory mappings where read-only mappings are expected, enabling attackers to gain elevated privileges.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a local privilege escalation exploit targeting Android devices with Adreno 4xx GPUs, specifically tested on the Nexus 6P running Android 6.0.1. The exploit leverages a vulnerability in the GPU's IOMMU DMA handling to overwrite the vdso.so memory region with custom shellcode. The main exploit logic is implemented in 'jni/exploit.c', which interacts with the /dev/kgsl-3d0 device node to perform memory mapping and command injection. The payload, written in ARM64 assembly ('jni/payload.s'), is injected into the vdso and hooks the __kernel_clock_gettime function. When triggered, the payload checks for root and init process, creates a marker file, forks, and establishes a reverse shell connection to 127.0.0.1:4919, providing a root shell to the attacker. The exploit is operational and requires local code execution on the target device. The repository includes build scripts and makefiles for compiling and deploying the exploit on a compatible Android device.
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