EIP-2026-103355

PRE-CVE

Linux Kernel < 4.4.0-21 (Ubuntu 16.04 x64) - 'netfilter target_offset' Local Privilege Escalation

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103355. PoCs published by Vitaly Nikolenko.

AI-analyzed exploit summary This exploit leverages a netfilter target_offset out-of-bounds (OOB) vulnerability in Ubuntu 16.04 (kernel 4.4.0-21-generic) to achieve local privilege escalation. It manipulates the refcount of a kernel object via crafted iptables rules, then triggers a use-after-free to execute arbitrary shellcode in kernel mode.

Description

Linux Kernel < 4.4.0-21 (Ubuntu 16.04 x64) - 'netfilter target_offset' Local Privilege Escalation

Exploits (1)

exploitdb WORKING POC
by Vitaly Nikolenko · clocallinux_x86-64
https://www.exploit-db.com/exploits/44300

This exploit leverages a netfilter target_offset out-of-bounds (OOB) vulnerability in Ubuntu 16.04 (kernel 4.4.0-21-generic) to achieve local privilege escalation. It manipulates the refcount of a kernel object via crafted iptables rules, then triggers a use-after-free to execute arbitrary shellcode in kernel mode.

Classification
Working Poc 100%
Attack Type
Lpe
Complexity
Complex
Reliability
Reliable
Target: Linux kernel 4.4.0-21-generic (Ubuntu 16.04)
No auth needed
Prerequisites: ip_tables kernel module loaded · SMEP/SMAP disabled
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026