Public Date:
526068: CVE-2009-3889 CVE-2009-3939 kernel: megaraid_sas permissions in sysfs

The MITRE CVE dictionary describes this issue as:

The poll_mode_io file for the megaraid_sas driver in the Linux kernel and earlier has world-writable permissions, which allows local users to change the I/O mode of the driver by modifying this file.

Find out more about CVE-2009-3939 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the version of the Linux kernel as shipped with Red Hat Enterprise Linux 3, as it does not implement the sysfs file system ("/sys/"), through which poll_mode_io file is exposed by the megaraid_sas driver. Issue was addressed in Red Hat Enterprise Linux 4, 5 and Red Hat Enterprise MRG via , and respectively.

CVSS v2 metrics

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

Base Score 3.6
Base Metrics AV:L/AC:L/Au:N/C:N/I:P/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact Partial

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-2010:0046 2010-01-19
Red Hat Enterprise Linux version 4 (kernel) RHSA-2010:0076 2010-02-02
MRG Grid for RHEL 5 Server (kernel-rt) RHSA-2009:1635 2009-12-03