Race condition in Linux kernel - CVE-2014-8086
Published: October 13, 2014 / Updated: August 10, 2020
Vulnerability identifier: #VU41223
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2014-8086
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
Race condition in the ext4_file_write_iter function in fs/ext4/file.c in the Linux kernel through 3.17 allows local users to cause a denial of service (file unavailability) via a combination of a write action and an F_SETFL fcntl operation for the O_DIRECT flag.
Affected software
Linux kernel
Fedora
kernel
Fedora
kernel
How to mitigate CVE-2014-8086
Install update from vendor's website.
kernel - update to 3.17.1-302.fc21
External References
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00004.html
- http://rhn.redhat.com/errata/RHSA-2015-0290.html
- http://rhn.redhat.com/errata/RHSA-2015-0694.html
- http://www.openwall.com/lists/oss-security/2014/10/09/25
- http://www.securityfocus.com/bid/70376
- http://www.spinics.net/lists/linux-ext4/msg45683.html
- http://www.spinics.net/lists/linux-ext4/msg45685.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1151353
- https://exchange.xforce.ibmcloud.com/vulnerabilities/96922
- https://lkml.org/lkml/2014/10/8/545
- https://lkml.org/lkml/2014/10/9/129