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CVE-2018-16658

22
FAUCET Score

CVE-2018-16658 is an information leak vulnerability in the Linux kernel, specifically affecting versions prior to 4.18.6, including various Canonical and Debian Linux distributions. A flaw in the cdrom_ioctl_drive_status function, due to an improper cast from unsigned long to int, allows local attackers to read kernel memory. Rated as MEDIUM severity with a CVSS score of 6.1, this vulnerability has a low attack complexity and requires local access, potentially leading to a high impact on confidentiality. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.18.6CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
18.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
4.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.55%
Probability of exploitation in next 30 days
EPSS Percentile
42.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0055 is in the 93rd percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-1062.rt56.1022.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-1062.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.16.1.el7a
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2018-16658Low

kernel: Information leak in cdrom_ioctl_drive_status

Apr 26, 2018

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Mailing ListPatchThird Party Advisory
access.redhat.com / errata/RHSA-2019:2029
access.redhat.com / errata/RHSA-2019:2043
access.redhat.com / errata/RHSA-2019:4154
cdn.kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.18.6
Release NotesTechnical Description
github.com / torvalds/linux/commit/8f3fafc9c2f0ece10832c25f7ffcb07c97a32ad4
Patch
lists.debian.org / debian-lts-announce/2018/10/msg00003.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 3797-1
MitigationThird Party Advisory
usn.ubuntu.com / 3797-2
MitigationThird Party Advisory
usn.ubuntu.com / 3820-1
Third Party Advisory
usn.ubuntu.com / 3820-2
Third Party Advisory
usn.ubuntu.com / 3820-3
Third Party Advisory
usn.ubuntu.com / 3822-1
Third Party Advisory
usn.ubuntu.com / 3822-2
Third Party Advisory
debian.org / security/2018/dsa-4308
Third Party Advisory
securityfocus.com / bid/105334
Third Party AdvisoryVDB Entry