Red Hat is aware of this issue and is tracking it via the following bug:
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. This issue was addressed in Red Hat Enterprise Linux 5 via https://rhn.redhat.com/errata/RHSA-2010-0147.html.
CVSS v2 metrics
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
|Red Hat Enterprise Linux 5 (kernel)||RHSA-2010:0147||2010-03-17|