Public Date:
1122472: CVE-2014-5045 kernel: vfs: refcount issues during unmount on symlink
A flaw was found in the way the Linux kernel's VFS subsystem handled reference counting when performing unmount operations on symbolic links. A local, unprivileged user could use this flaw to exhaust all available memory on the system or, potentially, trigger a use-after-free error, resulting in a system crash or privilege escalation.

Find out more about CVE-2014-5045 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue does not affect Linux kernel packages as shipped with Red Hat
Enterprise Linux 5 and Red Hat Enterprise MRG 2.

Future Linux kernel updates for Red Hat Enterprise Linux 6 and 7 may address
this issue.

CVSS v2 metrics

Base Score 6.2
Base Metrics AV:L/AC:H/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity High
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

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 6 (kernel) RHSA-2014:1392 2014-10-13
Red Hat Enterprise Linux Extended Update Support 6.5 (kernel) RHSA-2015:0062 2015-01-20
Red Hat Enterprise Linux 7 (kernel) RHSA-2014:1971 2014-12-09

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.


Red Hat would like to thank Vasily Averin of Parallels for reporting this issue.
Last Modified