EIP-2026-103040

PRE-CVE

XFree86 4.2 - 'XLOCALEDIR' Local Buffer Overflow (2)

Title source: legacy

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103040. PoCs published by Guilecool & deka.

AI-analyzed exploit summary This exploit leverages a buffer overflow in XFree86 utilities via the XLOCALEDIR environment variable to achieve local privilege escalation. It overwrites the return address with a hardcoded stack address and executes shellcode to spawn a root shell.

Description

XFree86 4.2 - 'XLOCALEDIR' Local Buffer Overflow (2)

Exploits (1)

exploitdb WORKING POC VERIFIED

by Guilecool & deka · clocallinux

https://www.exploit-db.com/exploits/22321

View Code ZIP pw:eip

This exploit leverages a buffer overflow in XFree86 utilities via the XLOCALEDIR environment variable to achieve local privilege escalation. It overwrites the return address with a hardcoded stack address and executes shellcode to spawn a root shell.

Classification

Working Poc 95%

Attack Type

Lpe

Complexity

Moderate

Reliability

Reliable

Target: XFree86 (xscreensaver utility)

No auth needed

Prerequisites: Local access to the system · XFree86 must be running · XLOCALEDIR environment variable must be unset or controllable

MITRE ATT&CK

T1068 - Exploitation for Privilege Escalation T1203 - Exploitation for Client Execution

devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve

Tracked Since Feb 18, 2026