CVE-2009-3939

High

The poll_mode_io file for the megaraid_sas driver in the Linux kernel 2.6.31.6 and earlier has world-writable permissions, which allows local users to change the I/O mode of the driver by modifying this file.

Package Linux Kernel
Published 2009-11-16
Last modified 2026-04-23
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

7.1

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness type

CWE-732

CVE-2009-3939 is classified as CWE-732

See CWE-732 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2009-3939 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Frequently asked questions

  • What is CVE-2009-3939?

    CVE-2009-3939 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . CVE-2009-3939 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2009-3939?

    CVE-2009-3939 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H .

  • Is there a patch available for CVE-2009-3939?

    No patch is currently available for CVE-2009-3939. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

  • Is CVE-2009-3939 actively exploited?

    No — CVE-2009-3939 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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