CVE-2012-2100

Description

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.

Category

7.1
CVSS
Severity: High
CVSS 2.0 •
EPSS 0.86% Top 30%
Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://rhn.redhat.com/errata/RHSA-2012-1580.html vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=809687
http://rhn.redhat.com/errata/RHSA-2012-1445.html vendor advisory
http://www.securityfocus.com/bid/53414 vdb entry
http://www.openwall.com/lists/oss-security/2012/04/12/11 mailing list
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2

Frequently Asked Questions

What is the severity of CVE-2012-2100?
CVE-2012-2100 has been scored as a high severity vulnerability.
How to fix CVE-2012-2100?
To fix CVE-2012-2100, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-2100 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2012-2100 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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