Back
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…
- 7.1HighCVSS base score
- 3.4%Exploitation in 30 daysEPSS · top 11% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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).
Timeline
ID reserved
By mitre
- 1 day later
· 1 day later
Published
- 15 years later
· 15 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.1 | AV:N/AC:M/Au:N/C:N/I:N/A:C |
- EPSS (exploitation in 30 days)
- 3.4% · top 11% of all CVEs (10 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
n/a
- affected n/a
References
12
- 38276 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=503358ae01b70ce6909d19dd01287093f6b6271c (opens in a new tab)x_refsource_CONFIRMx_transferred
- [linux-kernel] 20091209 [GIT PULL] ext4 updates for v2.6.33 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- RHSA-2010:0380 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.32-git6.log (opens in a new tab)x_refsource_CONFIRMx_transferred
- oval:org.mitre.oval:def:9874 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- SUSE-SA:2010:001 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://bugzilla.kernel.org/show_bug.cgi?id=14287 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 37658 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- SUSE-SA:2010:005 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- MDVSA-2011:029 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
- 38017 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2009-4275 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2009-4307)Record last updated .