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CVE-2018-12232

22
FAUCET Score

CVE-2018-12232 is a race condition vulnerability in the Linux kernel (through version 4.17.1) affecting the net/socket.c component. This flaw allows a NULL pointer dereference and system crash due to a race between fchownat and close operations on the same socket file descriptor. With a CVSS score of 5.9 (Medium), it can be exploited remotely with high attack complexity, leading to a denial of service. There is currently 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
<= 4.17.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.61%
Probability of exploitation in next 30 days
EPSS Percentile
93.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0661 is in the 92nd percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.el7a
View patch

Vendor Advisories (1)

redhatCVE-2018-12232Moderate

kernel: NULL pointer dereference if close and fchownat system calls share a socket file descriptor

Jun 4, 2018

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchThird Party Advisory
access.redhat.com / errata/RHSA-2018:2948
github.com / torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14
PatchThird Party Advisory
lkml.org / lkml/2018/6/5/14
Third Party Advisory
patchwork.ozlabs.org / patch/926519
PatchThird Party Advisory
usn.ubuntu.com / 3752-1
usn.ubuntu.com / 3752-2
usn.ubuntu.com / 3752-3
securityfocus.com / bid/104453
Third Party AdvisoryVDB Entry