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CVE-2009-4131

31
FAUCET Score

CVE-2009-4131 describes a local privilege escalation vulnerability in the EXT4_IOC_MOVE_EXT ioctl implementation within the Linux kernel's ext4 filesystem, affecting versions prior to 2.6.32-git6. This flaw allows local users to overwrite arbitrary files due to insufficient permission checks. With a CVSS score of 7.2, it is a high-severity vulnerability, indicating a local attack vector with low complexity and complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog and lacking Metasploit or Nuclei modules, an exploit (EDB-33395) exists on ExploitDB, though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.32CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:git-6:*:*:*:*:*:*
<= 2.6.32CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:rc6:*:*:*:*:*:*
2.6.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:*
2.6.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.1:*:*:*:*:*:*:*
2.6.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

AV:L/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.79%
Probability of exploitation in next 30 days
EPSS Percentile
52.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-33395 · Nov 9, 2009
This CVE's current EPSS score of 0.0079 is in the 72nd percentile among its peer group of 3,241 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2009-4131Important

kernel: ext4: Fix insufficient checks in EXT4_IOC_MOVE_EXT

Dec 9, 2009

References

git.kernel.org
lists.opensuse.org / opensuse-security-announce/2010-01/msg00000.html
lkml.org / lkml/2009/12/9/255
Patch
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/37658
Vendor Advisory
secunia.com / advisories/37686
secunia.com / advisories/38017
redhat.com / archives/fedora-package-announce/2009-December/msg00702.html
kernel.org / pub/linux/kernel/v2.6/snapshots/patch-2.6.32-git6.log
Patch
mandriva.com / security/advisories
securityfocus.com / bid/37277
Patch
theregister.co.uk / 2009/12/11/linux_kernel_bugs_patched
ubuntu.com / usn/USN-869-1
vupen.com / english/advisories/2009/3468
PatchVendor Advisory