EIP-2026-102638

PRE-CVE

Linux - Missing Locking in Siemens R3964 Line Discipline Race Condition

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-102638. PoCs published by Google Security Research.

AI-analyzed exploit summary This exploit demonstrates a race condition in the Siemens R3964 line discipline driver, leading to a use-after-free vulnerability. The PoC triggers a kernel crash by rapidly enabling and disabling signals via ioctl calls, causing memory corruption.

Description

Linux - Missing Locking in Siemens R3964 Line Discipline Race Condition

Exploits (1)

exploitdb WORKING POC VERIFIED
by Google Security Research · cdoslinux
https://www.exploit-db.com/exploits/46744

This exploit demonstrates a race condition in the Siemens R3964 line discipline driver, leading to a use-after-free vulnerability. The PoC triggers a kernel crash by rapidly enabling and disabling signals via ioctl calls, causing memory corruption.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Moderate
Reliability
Racy
Target: Linux kernel (drivers/tty/n_r3964.c) on Ubuntu 18.04 and other distributions with the n_r3964 module enabled
No auth needed
Prerequisites: n_r3964 line discipline module loaded · unprivileged user access
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026