Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 3.2.1 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://rhn.redhat.com/errata/RHSA-2012-1445.html
- http://rhn.redhat.com/errata/RHSA-2012-1580.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
- http://www.openwall.com/lists/oss-security/2012/04/12/11
- http://www.securityfocus.com/bid/53414
- https://bugzilla.redhat.com/show_bug.cgi?id=809687
- https://github.com/torvalds/linux/commit/d50f2ab6f050311dbf7b8f5501b25f0bf64a439
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://rhn.redhat.com/errata/RHSA-2012-1445.html
- http://rhn.redhat.com/errata/RHSA-2012-1580.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.2
- http://www.openwall.com/lists/oss-security/2012/04/12/11
- http://www.securityfocus.com/bid/53414
- https://bugzilla.redhat.com/show_bug.cgi?id=809687
FAQ
What is CVE-2012-2100?
CVE-2012-2100 is a vulnerability with a CVSS score of 7.1 (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...
How severe is CVE-2012-2100?
CVE-2012-2100 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2012-2100?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.