Public Date:
920499: CVE-2013-0914 Kernel: sa_restorer information leak

The MITRE CVE dictionary describes this issue as:

The flush_signal_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa_restorer field across an exec operation, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application containing a sigaction system call.

Find out more about CVE-2013-0914 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue affects the version of Linux kernel as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2 may address this issue.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 2.1
Base Metrics AV:L/AC:L/Au:N/C:P/I:N/A:N
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
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 version 5 (kernel) RHSA-2013:1034 2013-07-10
Red Hat Enterprise Linux OpenStack Platform 3.0 (kernel) RHSA-2013:1080 2013-07-16
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2013:0829 2013-05-20
Red Hat Enterprise Linux version 6 (kernel) RHSA-2013:1051 2013-07-16