CVE-2015-8839

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.

Category

5.1
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.06%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory ubuntu.com Vendor Advisory redhat.com Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1323577 third party advisory issue tracking
http://www.ubuntu.com/usn/USN-3006-1 third party advisory vendor advisory
http://www.securitytracker.com/id/1035455 third party advisory vdb entry
https://github.com/torvalds/linux/commit/ea3d7209ca01da209cda6f0dea8be9cc4b7a933b third party advisory
http://www.ubuntu.com/usn/USN-3005-1 third party advisory vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ea3d7209ca01da209cda6f0dea8be9cc4b7a933b vendor advisory
https://access.redhat.com/errata/RHSA-2017:2669 third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2016/04/01/4 third party advisory mailing list
http://www.securityfocus.com/bid/85798 third party advisory vdb entry
https://access.redhat.com/errata/RHSA-2017:2077 third party advisory vendor advisory
http://www.ubuntu.com/usn/USN-3007-1 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2017:1842 third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2015-8839?
CVE-2015-8839 has been scored as a medium severity vulnerability.
How to fix CVE-2015-8839?
To fix CVE-2015-8839, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-8839 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2015-8839 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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