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CVE-2018-5344

24
FAUCET Score

CVE-2018-5344 is a denial-of-service vulnerability in the Linux kernel (through version 4.14.13), specifically within the loop device driver, affecting Canonical, Linux, and Red Hat distributions. It stems from improper serialization of the lo_release function, leading to a use-after-free condition. With a CVSS score of 7.8 (High), this vulnerability can be exploited locally with low attack complexity, potentially resulting in a denial of service and possibly other unspecified impacts. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.14.13CPE 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:*:*:*
17.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 68th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-957.rt56.910.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.el7a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-957.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel

Vendor Advisories (1)

redhatCVE-2018-5344Moderate

kernel: drivers/block/loop.c mishandles lo_release serialization allowing denial-of-service

Jan 6, 2018

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchThird Party Advisory
access.redhat.com / errata/RHSA-2018:2948
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3083
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3096
Third Party Advisory
github.com / torvalds/linux/commit/ae6650163c66a7eff1acd6eb8b0f752dcfa8eba5
PatchThird Party Advisory
usn.ubuntu.com / 3583-1
Third Party Advisory
usn.ubuntu.com / 3583-2
Third Party Advisory
usn.ubuntu.com / 3617-1
Third Party Advisory
usn.ubuntu.com / 3617-2
Third Party Advisory
usn.ubuntu.com / 3617-3
Third Party Advisory
usn.ubuntu.com / 3619-1
Third Party Advisory
usn.ubuntu.com / 3619-2
Third Party Advisory
usn.ubuntu.com / 3632-1
Third Party Advisory
securityfocus.com / bid/102503
Third Party AdvisoryVDB Entry