What is CVE-1999-0426?

CVE-1999-0426 is a critical-severity vulnerability in SUSE Linux, classified under Incorrect Default Permissions. CVSS score: 9.8/10. Published 1999-03-01.

How severe is CVE-1999-0426?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-1999-0426 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in SUSE Linux

CVE-1999-0426

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

Published 1999-03-01 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.108 (95.7th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.106 · newest: 0.108 · change: +0.002

Affected products

SUSE Linux — versions 6.0

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

Public proof-of-concept exploits

References

exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0426 (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-1999-0426?: CVE-1999-0426 is a critical-severity vulnerability in SUSE Linux, classified under Incorrect Default Permissions. CVSS score: 9.8/10. Published 1999-03-01.
How severe is CVE-1999-0426?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-1999-0426 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.