What is CVE-2018-7755?

CVE-2018-7755 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2018-03-08.

How severe is CVE-2018-7755?

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

Is CVE-2018-7755 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Information disclosure in Linux Kernel

CVE-2018-7755

An issue was discovered in the fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

Vulnerability class: Information Disclosure

Published 2018-03-08 · 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: 0.007 (50.5th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04

Weakness classification (CWE)

CWE-200 — Information Disclosure

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

usn.ubuntu.com/3695-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3696-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3695-2/ (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/10/msg00003.html (mailing-list)
usn.ubuntu.com/3697-1/ (vendor-advisory, Third Party Advisory)
lkml.org/lkml/2018/3/7/1116 (Exploit, Third Party Advisory)
usn.ubuntu.com/3697-2/ (vendor-advisory, Third Party Advisory)
www.debian.org/security/2018/dsa-4308 (vendor-advisory)
usn.ubuntu.com/3698-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/3696-2/ (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2018-7755?: CVE-2018-7755 is a medium-severity vulnerability in Linux Kernel, classified under Information Disclosure. CVSS score: 5.5/10. Published 2018-03-08.
How severe is CVE-2018-7755?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2018-7755 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.