SB2014101304 - Race condition in Linux kernel
Published: October 13, 2014 Updated: August 10, 2020
Security Bulletin ID
SB2014101304
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2014-8086)
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.
Remediation
Install update from vendor's website.
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