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CVE-2020-27194 is an eBPF verifier bounds-tracking vulnerability in Linux kernels before version 5.8.15. The scalar32_min_max_or function in kernel/bpf/verifier.c mishandles bounds tracking when 64-bit values are used.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository contains a local privilege escalation exploit for CVE-2020-27194, targeting the Linux kernel eBPF subsystem (tested on kernel 5.8.14). The structure includes two main C source files (modprobe.c and root.c), a shell script (start.sh), and a README. The C files implement the exploit logic, leveraging eBPF map manipulation and arbitrary kernel memory read/write to hijack the modprobe_path mechanism. The exploit creates a fake shell script (/my_exp) that changes the permissions of /flag, and a fake binary (/fake) to trigger the modprobe_path. The shell script (start.sh) is used to launch a QEMU virtual machine with a specified kernel and initramfs for testing the exploit in a controlled environment. The exploit demonstrates successful privilege escalation by modifying /flag permissions, indicating root code execution. No network endpoints are involved; the attack vector is purely local.
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1 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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