CVE-2018-6559 json
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 normall…
published 2018-10-26 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-18310
- cvss
- 3.3
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- linux Ubuntu 18.04 LTS 4.15.0-42.45
- linux-aws Ubuntu 18.04 LTS 4.15.0-1029.30
- linux-gcp Ubuntu 16.04 LTS 4.15.0-1025.26~16.04.1
- linux-gcp Ubuntu 18.04 LTS 4.15.0-1025.26
- linux-hwe Ubuntu 16.04 LTS 4.15.0-42.45~16.04.1
- linux-kvm Ubuntu 18.04 LTS 4.15.0-1027.27
- linux-oem Ubuntu 18.04 LTS 4.15.0-1028.33
- linux-azure Ubuntu 14.04 LTS 4.15.0-1035.36~14.04.2
ubuntu advisories UBUNTU-CVE-2018-6559
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- launchpad.net https://launchpad.net/bugs/1793458 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 3.3 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
Affected products
- Canonical Ltd. Linux kernel, as used in Ubuntu 18.04 LTS and Ubuntu 18.10
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
- Technology feeds
References
-
launchpad.net
/bugs/1793458
exploit, issue-tracking, third-party-advisory
-
usn.ubuntu.com
/3836-2/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3835-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3833-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3832-1/
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3836-1/
vendor-advisory, third-party-advisory
-
securityfocus.com
/bid/105752
vdb-entry, third-party-advisory
-
people.canonical.com
/~ubuntu-security/cve/2018/CVE-2018-6559.html
third-party-advisory
-
lists.ubuntu.com
/archives/kernel-team/2018-October/096172.html
third-party-advisory
Sources
- CVE List CVE-2018-6559
- NVD CVE-2018-6559
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.