CVE-2021-33909

This repository contains a functional exploit for CVE-2021-33909, a size_t-to-int vulnerability in Linux's filesystem layer. The exploit leverages a type conversion flaw to achieve local privilege escalation by manipulating directory structures and user namespaces.

This repository contains a functional exploit for CVE-2021-33909, a size_t-to-int vulnerability in the Linux filesystem layer. The exploit leverages user namespace and mount namespace manipulations to trigger the vulnerability, potentially leading to local privilege escalation.

This repository contains a functional kernel module that patches CVE-2021-33909 at runtime using kprobes to replace vulnerable functions in the Linux kernel's filesystem layer. The module intercepts calls to seq_read_iter, seq_lseek, and single_open_size to mitigate the vulnerability.

This repository contains a functional exploit for CVE-2021-33909, a size_t-to-int vulnerability in Linux's filesystem layer (Sequoia). The exploit leverages a user namespace and filesystem operations to trigger a crash, demonstrating the vulnerability.