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CVE-2012-2100

24
FAUCET Score

CVE-2012-2100 is a denial-of-service vulnerability affecting the Linux kernel before version 3.2.2, specifically within the ext4 filesystem. It allows user-assisted remote attackers to trigger inconsistent filesystem data by providing a malformed ext4 filesystem with a large FLEX_BG group size. This vulnerability has a CVSS score of 7.1, indicating high severity due to its network attack vector, medium attack complexity, and high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.2.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:x86:*
3.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:x86:*

CVSS Data

CVSS version used by this source: 2.0

7.1HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.68%
Probability of exploitation in next 30 days
EPSS Percentile
84.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0268 is in the 42nd percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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 (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-308.20.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-279.19.1.el6
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2012-2100Low

kernel: ext4: fix inconsistency in ext4_fill_flex_info()

Jan 10, 2012

References

git.kernel.org
rhn.redhat.com / errata/RHSA-2012-1445.html
rhn.redhat.com / errata/RHSA-2012-1580.html
bugzilla.redhat.com / show_bug.cgi
github.com / torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
kernel.org / pub/linux/kernel/v3.x/ChangeLog-3.2.2
openwall.com / lists/oss-security/2012/04/12/11
securityfocus.com / bid/53414