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CVE-2023-4147 is a use-after-free vulnerability in the Linux kernel Netfilter nftables subsystem. The flaw occurs in nf_tables_newrule() when a rule is added with the NFTA_RULE_CHAIN_ID attribute, leaving a stale object reference that can subsequently be dereferenced.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a Python proof-of-concept exploit for CVE-2023-4147, a Use-After-Free (UAF) vulnerability in the Linux kernel's Netfilter subsystem (specifically NFTA_RULE_CHAIN_ID). The main file, 'ExploitCVE-2023-4147.py', uses Python's ctypes library to interact directly with system calls, creating a Netlink socket and sending a specially crafted message to the kernel. The payload is designed to trigger the UAF condition, which may result in privilege escalation (root access) or a system crash, depending on the system's state and memory layout. The exploit must be run locally on a vulnerable Linux system. The repository also includes a README.md that explains the exploit's mechanism, risks, and mitigation strategies. No remote or network endpoints are targeted; the attack vector is purely local, requiring code execution privileges on the target machine.
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A Linux kernel Netfilter use-after-free in nf_tables_newrule when adding a rule containing NFTA_RULE_CHAIN_ID.
A Linux kernel netfilter use-after-free in nf_tables_newrule when adding a rule with NFTA_RULE_CHAIN_ID.
A Linux kernel Netfilter nf_tables use-after-free vulnerability triggered by adding a rule using NFTA_RULE_CHAIN_ID.
A use-after-free vulnerability in Linux kernel netfilter nf_tables_newrule when adding a rule with NFTA_RULE_CHAIN_ID.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
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