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Vulnerability record · CVE-2018-6559 · published 26 October 2018

CVE-2018-6559: Linux kernel information exposure vulnerability

Linux · Linux Kernel

The Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10, allows local users to obtain names of files in which they would not normally be able to access via an overlayfs mount inside of a user namespace.

3.3 CVSS 3.0 Low EPSS 0.53% · top 57.3% CWE-200 · Information exposure
3.3CVSS 3.0 base score, v2 2.1
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10, allows local users to obtain names of files in which they would not normally be able to access via an overlayfs mount inside of a user namespace.

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/105752 Third Party AdvisoryVDB Entry
https://launchpad.net/bugs/1793458 ExploitIssue TrackingThird Party Advisory
https://lists.ubuntu.com/archives/kernel-team/2018-October/096172.html Third Party Advisory
https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-6559.html Third Party Advisory
https://usn.ubuntu.com/3832-1/ Third Party Advisory
https://usn.ubuntu.com/3833-1/ Third Party Advisory
https://usn.ubuntu.com/3835-1/ Third Party Advisory
https://usn.ubuntu.com/3836-1/ Third Party Advisory
https://usn.ubuntu.com/3836-2/ Third Party Advisory
http://www.securityfocus.com/bid/105752 Third Party AdvisoryVDB Entry
https://launchpad.net/bugs/1793458 ExploitIssue TrackingThird Party Advisory
https://lists.ubuntu.com/archives/kernel-team/2018-October/096172.html Third Party Advisory
https://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-6559.html Third Party Advisory
https://usn.ubuntu.com/3832-1/ Third Party Advisory
https://usn.ubuntu.com/3833-1/ Third Party Advisory
https://usn.ubuntu.com/3835-1/ Third Party Advisory
https://usn.ubuntu.com/3836-1/ Third Party Advisory
https://usn.ubuntu.com/3836-2/ Third Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-6559), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.