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Bug 300195 (CVE-2009-4307) - Kernel: ext4 ext4_fill_flex_info() DoS (CVE-2009-4307)
Summary: Kernel: ext4 ext4_fill_flex_info() DoS (CVE-2009-4307)
Status: RESOLVED FIXED
Alias: CVE-2009-4307
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: High normal (vote)
Assignee: Gentoo Security
URL: http://git.kernel.org/?p=linux/kernel...
Whiteboard: [linux <2.6.31.8] [gp <2.6.31-9]
Keywords:
Depends on:
Blocks:
 
Reported: 2010-01-08 17:20 UTC by Alex Legler (RETIRED)
Modified: 2013-09-15 18:50 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


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Description Alex Legler (RETIRED) archtester gentoo-dev Security 2010-01-08 17:20:31 UTC
CVE-2009-4307 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-4307):
  The ext4_fill_flex_info function in fs/ext4/super.c in the Linux
  kernel before 2.6.32-git6 allows user-assisted remote attackers to
  cause a denial of service (divide-by-zero error and panic) via a
  malformed ext4 filesystem containing a super block with a large
  FLEX_BG group size (aka s_log_groups_per_flex value).