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CVE-2011-3638

17
FAUCET Score

CVE-2011-3638 describes a denial-of-service vulnerability in the Linux kernel, specifically affecting versions prior to 3.0. The flaw in fs/ext4/extents.c allows local users to crash the system by manipulating ext4 umount and mount operations, due to improper marking of modified extents as dirty during splitting. This vulnerability has a CVSS score of 4.0, indicating a low severity with local access and high attack complexity, but a complete availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
1.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 38th percentile among its peer group of 1,595 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-274.18.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5.6 EUS - Server OnlyFixed in: kernel-0:2.6.18-238.37.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-220.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.1 EUS - Server OnlyFixed in: kernel-0:2.6.32-131.25.1.el6
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel

Vendor Advisories (1)

redhatCVE-2011-3638Moderate

kernel: ext4: ext4_ext_insert_extent() kernel oops

Sep 28, 2011

References

ftp.osuosl.org / pub/linux/kernel/v3.0/ChangeLog-3.0
Broken Link
git.kernel.org
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / torvalds/linux/commit/667eff35a1f56fa74ce98a0c7c29a40adc1ba4e3
PatchThird Party Advisory
openwall.com / lists/oss-security/2011/10/24/2
Mailing ListThird Party Advisory