What is CVE-2017-18200?

CVE-2017-18200 is a medium-severity vulnerability in Linux Kernel, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2018-02-26.

How severe is CVE-2017-18200?

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

Improper input validation in Linux Kernel

CVE-2017-18200

The f2fs implementation in the Linux kernel before 4.14 mishandles reference counts associated with f2fs_wait_discard_bios calls, which allows local users to cause a denial of service (BUG), as demonstrated by fstrim.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-02-26 · 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:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (23.9th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 23.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Linux Kernel

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/torvalds/linux/commit/638164a2718f337ea224b747cf5977ef143166a4 (Patch, Third Party Advisory)
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2017-18200?: CVE-2017-18200 is a medium-severity vulnerability in Linux Kernel, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2018-02-26.
How severe is CVE-2017-18200?: Medium severity. CVSS v3 base score is 5.5 out of 10.