CVE-2023-4147

HIGH

Linux Kernel >=5.9 <5.10.190 - Use-After-Free in Netfilter NFTA_RULE_CHAIN_ID

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-4147. PoCs published by murdok1982.

AI-analyzed exploit summary The repository contains a Python-based exploit for CVE-2023-4147, which targets a Netlink socket vulnerability in the Linux kernel's nftables subsystem. The exploit constructs a malicious payload to trigger a use-after-free (UAF) condition by manipulating NFTA_RULE_CHAIN_ID.

Description

A use-after-free flaw was found in the Linux kernel’s Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system.

Exploits (1)

nomisec WORKING POC
by murdok1982 · poc
https://github.com/murdok1982/Exploit-en-Python-para-CVE-2023-4147

The repository contains a Python-based exploit for CVE-2023-4147, which targets a Netlink socket vulnerability in the Linux kernel's nftables subsystem. The exploit constructs a malicious payload to trigger a use-after-free (UAF) condition by manipulating NFTA_RULE_CHAIN_ID.

Classification
Working Poc 80%
Attack Type
Lpe
Complexity
Moderate
Reliability
Theoretical
Target: Linux kernel (nftables subsystem)
No auth needed
Prerequisites: Linux system with vulnerable kernel · Python 3.8+ · libc.so.6
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (14)

Core 14
Core References
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2023:5069
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2023:5091
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2023:5093
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2023:7382
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2023:7389
Third Party Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2023:7411
Patch, Third Party Advisory vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2023-4147
Issue Tracking, Patch, Third Party Advisory issue-tracking x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2225239

Scores

CVSS v3 7.8
EPSS 0.0056
EPSS Percentile 42.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-416
Status published
Products (11)
debian/debian_linux 10.0
debian/debian_linux 11.0
debian/debian_linux 12.0
fedoraproject/fedora 38
linux/linux_kernel 6.5 rc1 (3 CPE variants)
linux/linux_kernel 5.9 - 5.10.190
redhat/enterprise_linux 9.0
redhat/enterprise_linux_eus 9.2
redhat/enterprise_linux_for_real_time 9.0
redhat/enterprise_linux_for_real_time_for_nfv 9.0
... and 1 more
Published Aug 07, 2023
Tracked Since Feb 18, 2026