What is CVE-2012-2100?

CVE-2012-2100 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10. CVE-2012-2100 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2012-2100?

CVE-2012-2100 has a CVSS score of 7.1 out of 10, rated High severity. The vector string is AV:N/AC:M/Au:N/C:N/I:N/A:C.

Is there a patch available for CVE-2012-2100?

No patch is currently available for CVE-2012-2100. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2012-2100 actively exploited?

CVE-2012-2100 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2012-2100

High

The ext4_fill_flex_info function in fs/ext4/super.c in the Linux kernel before 3.2.2, on the x86 platform and unspecified other platforms, allows user-assisted remote attackers to trigger inconsistent filesystem-groups data and possibly cause a denial of service via a malformed ext4 filesystem containing a super block with a large FLEX_BG group size (aka s_log_groups_per_flex value). NOTE: this vulnerability exists because of an incomplete fix for CVE-2009-4307.

Package Linux Kernel

Published 2012-07-03

Last modified 2026-04-29

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

7.1

out of 10

High

Attack Vector

Network

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

None

Integrity

None

Availability

Vector string

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

Weakness type

CWE-189

CVE-2012-2100 is classified as CWE-189

See CWE-189 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2012-2100 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
http://rhn.redhat.com/errata/RHSA-2012-1445.html
Red Hat
http://rhn.redhat.com/errata/RHSA-2012-1580.html
Kernel.org
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
Openwall
http://www.openwall.com/lists/oss-security/2012/04/12/11
Securityfocus
http://www.securityfocus.com/bid/53414
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=809687
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
Patch

Details

CVE ID CVE-2012-2100

Severity High

CVSS score 7.1 / 10

CVSS version 2.0

Published 2012-07-03

Modified 2026-04-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2012-2100?

CVE-2012-2100 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . CVE-2012-2100 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2012-2100?

CVE-2012-2100 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 2.0). The vector string is AV:N/AC:M/Au:N/C:N/I:N/A:C.
Is there a patch available for CVE-2012-2100?

No patch is currently available for CVE-2012-2100. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2012-2100 actively exploited?

No — CVE-2012-2100 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.