HIGH
CVE-2009-3939
CWE-732Published: November 16, 2009· Updated: Jun 16, 2026
7.1
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2009-3939 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.1.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Affected Vendors & Products
avaya7 product(s)
aura application enablement servicesaura communication manageraura session manageraura sip enablement servicesaura system manageraura system platformvoice portal
Canonical1 product(s)
ubuntu linux
Debian1 product(s)
debian linux
Linux1 product(s)
linux kernel
openSUSE1 product(s)
opensuse
Red Hat5 product(s)
virtualizationenterprise linux desktopenterprise linux eusenterprise linux serverenterprise linux workstation
SUSE2 product(s)
linux enterprise desktoplinux enterprise server
Source: NVD CPE · 29 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (46)
→
http://osvdb.org/60201Broken Link
→
http://secunia.com/advisories/37909Broken Link
→
http://secunia.com/advisories/38017Broken Link
→
http://secunia.com/advisories/38276Broken Link
→
http://secunia.com/advisories/38492Broken Link
→
http://secunia.com/advisories/38779Broken Link
→
http://support.avaya.com/css/P8/documents/100073666Third Party Advisory
→
http://www.debian.org/security/2010/dsa-1996Third Party Advisory
Quick Facts
CVE IDCVE-2009-3939
CVSS Score7.1 / 10
SeverityHIGH
WeaknessCWE-732
CISA KEVNo
Affected7 vendor(s)
PublishedNov 16, 2009
Related CVEs (CWE-732)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2009-3939 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.