CVE-2015-8839

Impact:
Moderate
Public Date:
2016-03-31
CWE:
CWE-362
Bugzilla:
1323577: CVE-2015-8839 kernel: ext4 filesystem page fault race condition with fallocate call.
A flaw was found in the Linux kernel when attempting to "punch a hole" in files existing on an ext4 filesystem. When punching holes into a file races with the page fault of the same area, it is possible that freed blocks remain referenced from page cache pages mapped to process' address space.

Find out more about CVE-2015-8839 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 5 and 6.

This issue affects the Linux kernels as shipped with Red Hat Enterprise Linux 7 and MRG-2 kernels.

CVSS v2 metrics

Base Score 4.7
Base Metrics AV:L/AC:M/Au:N/C:N/I:C/A:N
Access Vector Local
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Complete
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 7 (kernel) RHSA-2017:1842 2017-08-01
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2017:2669 2017-09-06
Red Hat Enterprise Linux for Real Time for NFV (v. 7) (kernel-rt) RHSA-2017:2077 2017-08-01

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected
Red Hat Enterprise Linux 4 kernel Not affected
Last Modified