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CVE-2015-4178

16
FAUCET Score

CVE-2015-4178 is a denial-of-service vulnerability affecting the Linux kernel before version 4.0.5, specifically related to the fs_pin implementation. A local attacker with user-namespace root access can trigger a system crash by exploiting an inconsistency in a list data structure during an MNT_DETACH umount2 system call. Rated as MEDIUM severity (CVSS 5.5), this vulnerability requires local access and has a high impact on availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

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
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.6%
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 85th percentile among its peer group of 15,938 CVEs.

Social Chatter

No social media mentions found for this CVE.

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)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2015-4178Moderate

kernel: list corruption of m_list or s_list if unused

Jul 1, 2015

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
openwall.com / lists/oss-security/2015/05/29/10
openwall.com / lists/oss-security/2015/05/29/5
Patch
bugzilla.redhat.com / show_bug.cgi
github.com / torvalds/linux/commit/820f9f147dcce2602eefd9b575bbbd9ea14f0953
PatchVendor Advisory
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.0.5
Vendor Advisory
openwall.com / lists/oss-security/2015/06/04/5