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CVE-2018-14656

21
FAUCET Score

CVE-2018-14656 is a medium-severity vulnerability in the Linux kernel, specifically within the show_opcodes() function, due to a missing address check. This flaw allows a local attacker with low privileges to dump arbitrary kernel memory into the dmesg log, leading to a high impact on confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.18CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
4.19CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:4.19:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.0HIGH

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

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.53%
Probability of exploitation in next 30 days
EPSS Percentile
41.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0053 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 (1)

redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2018-14656Important

kernel: Arbitrary Kernel Read into dmesg via Missing Address Check in segfault Handler

Sep 13, 2018

References

bugs.chromium.org / p/project-zero/issues/detail
Issue TrackingPatchThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
git.kernel.org / pub/scm/linux/kernel/git/torvalds/linux.git/commit
PatchThird Party Advisory
lore.kernel.org / lkml/20180828154901.112726-1-jannh%40google.com/T
seclists.org / oss-sec/2018/q4/9
Mailing ListPatchThird Party Advisory
securitytracker.com / id/1041804
Third Party AdvisoryVDB Entry