CVE-2009-4307
The MITRE CVE dictionary describes this issue as:
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).
Find out more about CVE-2009-4307 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
Red Hat is aware of this issue and is tracking it via the following bug:
https://bugzilla.redhat.com/CVE-2009-4307
The Linux kernel packages as shipped with Red Hat Enterprise Linux 3, 4 and Red Hat Enterprise MRG do not include support for EXT4, and therefore are not affected by this issue.
A future kernel update for Red Hat Enterprise Linux 5 will address this flaw.
CVSS v2 metrics
| Base Score | 4.9 |
|---|---|
| Base Metrics | AV:L/AC:L/Au:N/C:N/I:N/A:C |
| Access Vector | Local |
| Access Complexity | Low |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 5 (kernel) | RHSA-2010:0178 | 2010-03-29 |
| Red Hat Enterprise Linux EUS (v. 5.4 server) (kernel) | RHSA-2010:0380 | 2010-04-27 |
CVE description copyright © 2017, The MITRE Corporation