CVE-2015-8839

Name: CVE-2015-8839
Creator: NVD / NIST
Published: 2016-05-02T10:59:22.11+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.1/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2015-8839 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. Multiple race conditions in the ext4 filesystem implementation in the Linux kernel before 4.5 allow local users to cause a denial of service (disk corruption) by writing to a page that is associated with a different user's file after unsynchronized hole punching and page-fault handling.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

Multiple race conditions in the ext4 filesystem implementation in the Linux kernel before 4.5 allow local users to cause a denial of service (disk corruption) by writing to a page that is associated with a different user's file after unsynchronized hole punching and page-fault handling.

Metrics

CVSS 3.1

5.1/10

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

EPSS Probability

0.35%

26.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-362

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	<= 4.4.221	—
Linux	Linux Kernel	4.5	Rc1
Canonical	Ubuntu Linux	14.04	—
Canonical	Ubuntu Linux	16.04	—

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ea3d7209ca01da209cda6f0dea8be9cc4b7a933bVendor Advisory
http://www.openwall.com/lists/oss-security/2016/04/01/4Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/85798Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1035455Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-3005-1Third Party Advisory
http://www.ubuntu.com/usn/USN-3006-1Third Party Advisory
http://www.ubuntu.com/usn/USN-3007-1Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2669Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1323577Issue Tracking, Third Party Advisory
https://github.com/torvalds/linux/commit/ea3d7209ca01da209cda6f0dea8be9cc4b7a933bThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.htmlThird Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ea3d7209ca01da209cda6f0dea8be9cc4b7a933bVendor Advisory
http://www.openwall.com/lists/oss-security/2016/04/01/4Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/85798Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1035455Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-3005-1Third Party Advisory
http://www.ubuntu.com/usn/USN-3006-1Third Party Advisory
http://www.ubuntu.com/usn/USN-3007-1Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:1842Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2077Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2669Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1323577Issue Tracking, Third Party Advisory
https://github.com/torvalds/linux/commit/ea3d7209ca01da209cda6f0dea8be9cc4b7a933bThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.htmlThird Party Advisory

Timeline

Published: May 2, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-8839?

How severe is CVE-2015-8839?

CVE-2015-8839 has a CVSS score of 5.1/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2015-8839?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-8839?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST