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CVE-2018-8043

20
FAUCET Score

CVE-2018-8043 describes a NULL pointer dereference vulnerability in the unimac_mdio_probe function of the Linux kernel, affecting versions up to 4.15.8, including Canonical and Ubuntu Linux distributions. This flaw allows a local attacker to trigger a denial of service. With a CVSS score of 5.5 (Medium), it requires local access and low attack complexity, leading to high availability impact. 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
<= 4.15.8CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 87th percentile among its peer group of 15,937 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2018-8043Low

kernel: NULL pointer dereference in drivers/net/phy/mdio-bcm-unimac.c:unimac_mdio_probe() can lead to denial of service

Jan 11, 2018

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchVendor Advisory
github.com / torvalds/linux/commit/297a6961ffb8ff4dc66c9fbf53b924bd1dda05d5
PatchThird Party Advisory
usn.ubuntu.com / 3619-1
Third Party Advisory
usn.ubuntu.com / 3619-2
Third Party Advisory
usn.ubuntu.com / 3630-1
Third Party Advisory
usn.ubuntu.com / 3630-2
Third Party Advisory
usn.ubuntu.com / 3632-1
Third Party Advisory
securitytracker.com / id/1040749
Third Party AdvisoryVDB Entry