CVE Database


Impact: Important
Public: 2009-10-22
Bugzilla: 538734: CVE-2009-4021 kernel: fuse: prevent fuse_put_request on invalid pointer
IAVA: 2010-A-0015


The MITRE CVE dictionary describes this issue as:

The fuse_direct_io function in fs/fuse/file.c in the fuse subsystem in the Linux kernel before 2.6.32-rc7 might allow attackers to cause a denial of service (invalid pointer dereference and OOPS) via vectors possibly related to a memory-consumption attack.

Find out more about CVE-2009-4021 from the MITRE CVE dictionary and NIST NVD.


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 and 4 do not include support for FUSE, and therefore are not affected by this issue.
It was addressed in Red Hat Enterprise Linux 5 via
A future kernel update for Red Hat Enterprise MRG will address this flaw.

CVSS v2 metrics

Base Score: 4.6
Base Metrics: AV:L/AC:L/Au:S/C:N/I:N/A:C
Access Vector: Local
Access Complexity: Low
Authentication: Single Instance
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
MRG Grid for RHEL 5 Server (kernel-rt) RHSA-2010:0041 January 21, 2010
Red Hat Enterprise Linux version 5 (kernel) RHSA-2010:0046 January 19, 2010

External References

This page is generated automatically and has not been checked for errors or omissions.

For clarification or corrections please contact the Red Hat Security Response Team.