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CVE-2015-8839

15
FAUCET Score

CVE-2015-8839 describes multiple race conditions in the ext4 filesystem of the Linux kernel prior to version 4.5, affecting various Linux distributions including Canonical and Ubuntu. This vulnerability has a CVSS score of 5.1 (Medium) and allows local attackers to cause a denial of service through disk corruption due to unsynchronized hole punching and page-fault handling. 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
<= 4.4.221CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
4.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:4.5:rc1:*:*:*:*:*:*
4.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:4.5:rc2:*:*:*:*:*:*
4.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:4.5:rc3:*:*:*:*:*:*
4.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:4.5:rc4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.1MEDIUM

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.4
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 36th percentile among its peer group of 1,595 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 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-693.rt56.617.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-693.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-693.2.1.rt56.585.el6rt
View patch

Vendor Advisories (1)

redhatCVE-2015-8839Moderate

kernel: ext4 filesystem page fault race condition with fallocate call.

Mar 31, 2016

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Vendor Advisory
access.redhat.com / errata/RHSA-2017:1842
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2077
Third Party Advisory
access.redhat.com / errata/RHSA-2017:2669
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / torvalds/linux/commit/ea3d7209ca01da209cda6f0dea8be9cc4b7a933b
Third Party Advisory
lists.debian.org / debian-lts-announce/2020/06/msg00011.html
Third Party Advisory
lists.debian.org / debian-lts-announce/2020/06/msg00013.html
Third Party Advisory
openwall.com / lists/oss-security/2016/04/01/4
Mailing ListThird Party Advisory
securityfocus.com / bid/85798
Third Party AdvisoryVDB Entry
securitytracker.com / id/1035455
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-3005-1
Third Party Advisory
ubuntu.com / usn/USN-3006-1
Third Party Advisory
ubuntu.com / usn/USN-3007-1
Third Party Advisory