What is CVE-2018-20509?

CVE-2018-20509 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2019-04-30.

How severe is CVE-2018-20509?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Information disclosure in Linux Kernel

CVE-2018-20509

The print_binder_ref_olocked function in drivers/android/binder.c in the Linux kernel 4.14.90 allows local users to obtain sensitive address information by reading " ref *desc *node" lines in a debugfs file.

Vulnerability class: Information Disclosure

Published 2019-04-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel — versions 4.14.90

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

github.com/Yellow-Pay/CVE/blob/master/CVE-2018-20509.md (Third Party Advisory)
www.mail-archive.com/debian-security-tracker@lists.debian.org/msg03902.html (mailing-list)
security.netapp.com/advisory/ntap-20190517-0002/

Frequently asked questions

What is CVE-2018-20509?: CVE-2018-20509 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2019-04-30.
How severe is CVE-2018-20509?: Medium severity. CVSS v3 base score is 5.5 out of 10.