CVE-2024-1086 PoC — Use-after-free in Linux kernel's netfilter: nf_tables component

Source

https://github.com/kevcooper/CVE-2024-1086-checker

Associated Vulnerability

Title: Use-after-free in Linux kernel's netfilter: nf_tables component (CVE-2024-1086)
Description:A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The nft_verdict_init() function allows positive values as drop error within the hook verdict, and hence the nf_hook_slow() function can cause a double free vulnerability when NF_DROP is issued with a drop error which resembles NF_ACCEPT. We recommend upgrading past commit f342de4e2f33e0e39165d8639387aa6c19dff660.

Readme

# CVE-2024-1086-checker

This is a simple checker script to detect the kernel configuration which is
vulnerable to exploitation. A result of "kernel config not vulnerable" from
this script only means that the vulnerability is not exploitable with currently
known paths.

## How to Use

```shell
curl -s "https://raw.githubusercontent.com/kevcooper/CVE-2024-1086-checker/main/check_cve_2024_1086.py" | python3
```

```shell
git clone https://github.com/kevcooper/CVE-2024-1086-checker.git
cd CVE-2024-1086-checker
python3 check_cve_2024_1086.py
```

File Snapshot

Remarks

1. It is advised to access via the original source first.

2. Local POC snapshots are reserved for subscribers — if the original source is unavailable, the local mirror is part of the paid plan.

View subscription plans →