CVE-2017-18200

The f2fs implementation in the Linux kernel before 4.14 mishandles reference counts associated...

5.5 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.33%Down 0.1 points since Apr 14, 2021

What each source reports

NVD Score used 5.5

Record: CVE-2017-18200
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 4.9 MediumAV:L/AC:L/Au:N/C:N/I:N/A:C
Weakness: CWE-20
Updated: 2026-11-02

CVE List No score

Record: CVE-2017-18200
Updated: 2026-11-02

EUVDEUVD-2017-9333 No score

Record: EUVD-2017-9333
Updated: 2026-11-03

GitHub AdvisoriesGHSA-j9rw-gf83-2qrw 5.5

The f2fs implementation in the Linux kernel before 4.14 mishandles reference counts associated...

Record: GHSA-j9rw-gf83-2qrw
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-20
Updated: 2026-11-02

OSVUBUNTU-CVE-2017-18200 5.5

Record: UBUNTU-CVE-2017-18200
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

linux kernel

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-18200 is a medium vulnerability (CVSS 5.5) in Linux Kernel, published February 26, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.