cve/2009/CVE-2009-4307.md

### [CVE-2009-4307](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-4307)
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### Description

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).

### POC

#### Reference
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9874
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9874

#### Github
No PoCs found on GitHub currently.