Public Date:
1172806: CVE-2014-9322 kernel: x86: local privesc due to bad_iret and paranoid entry incompatibility
A flaw was found in the way the Linux kernel handled GS segment register base switching when recovering from a #SS (stack segment) fault on an erroneous return to user space. A local, unprivileged user could use this flaw to escalate their privileges on the system.

Find out more about CVE-2014-9322 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue does affect the Linux kernel packages as shipped with Red Hat
Enterprise Linux 4, 5, 6, and 7, and Red Hat Enterprise MRG 2. Future Linux
kernel updates for the respective releases will address this issue.

CVSS v2 metrics

Base Score 7.2
Base Metrics AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

CVSS v3 metrics

CVSS3 Base Score 8.4
CVSS3 Base Metrics CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

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 Advanced Update Support 6.2 (kernel) RHSA-2014:2028 2014-12-22
Red Hat Enterprise Linux EUS (v. 5.9 server) (kernel) RHSA-2014:2029 2014-12-22
Red Hat Enterprise Linux 6 (kernel) RHSA-2014:1997 2014-12-16
Red Hat Enterprise Linux Extended Update Support 6.4 (kernel) RHSA-2014:2030 2014-12-22
Red Hat Enterprise Linux 7 (kernel) RHSA-2014:2010 2014-12-18
Red Hat Enterprise Linux Extended Update Support 6.5 (kernel) RHSA-2014:2009 2014-12-17
Red Hat MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2014:1998 2014-12-16
Red Hat Enterprise Linux Extended Lifecycle Support 4 (kernel) RHSA-2015:0009 2015-01-05
Red Hat Enterprise Linux 5 (kernel) RHSA-2014:2008 2014-12-17
Red Hat Enterprise Linux Long Life (v. 5.6 server) (kernel) RHSA-2014:2031 2014-12-22

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 kernel 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 Andy Lutomirski for reporting this issue.
Last Modified