CVE-1999-0426

CRITICAL

SUSE Linux - Incorrect Default Permissions in /dev/kmem

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-1999-0426. PoCs published by Nergal.

AI-analyzed exploit summary This exploit demonstrates blind TCP spoofing against Linux kernels in the 2.0.3x range by leveraging predictable IP ID increments and invalid ACK sequence number handling. It establishes a spoofed connection and sends arbitrary data to the target.

Description

The default permissions of /dev/kmem in Linux versions before 2.0.36 allows IP spoofing.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Nergal · cremotelinux
https://www.exploit-db.com/exploits/19458

This exploit demonstrates blind TCP spoofing against Linux kernels in the 2.0.3x range by leveraging predictable IP ID increments and invalid ACK sequence number handling. It establishes a spoofed connection and sends arbitrary data to the target.

Classification
Working Poc 95%
Attack Type
Other
Complexity
Complex
Reliability
Racy
Target: Linux kernel 2.0.3x
No auth needed
Prerequisites: Target machine must not be actively communicating · Spoofed machine must be offline or unreachable · No packet loss between attacker and target
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (1)

Core 1
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0426

Scores

CVSS v3 9.8
EPSS 0.0812
EPSS Percentile 92.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-276
Status published
Products (1)
suse/suse_linux 6.0
Published Mar 01, 1999
Tracked Since Feb 18, 2026