CVE-2012-2100
Linux Kernel < 3.2.2 - Denial of Service via Malformed ext4 Filesystem
Title source: llmDescription
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.
References (8)
Core 8
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
http://rhn.redhat.com/errata/RHSA-2012-1580.html
Issue Tracking x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=809687
Vendor Advisory vendor-advisory
x_refsource_redhat
http://rhn.redhat.com/errata/RHSA-2012-1445.html
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/53414
Mailing List mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2012/04/12/11
Patch x_refsource_confirm
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
Patch x_refsource_confirm
https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439b
Vendor Advisory x_refsource_confirm
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
Scores
EPSS
0.0268
EPSS Percentile
84.4%
Details
CWE
CWE-189
Status
published
Products (2)
linux/linux_kernel
3.2
linux/linux_kernel
< 3.2.1
Published
Jul 03, 2012
Tracked Since
Feb 18, 2026