Public Date:
540736: CVE-2009-4020 kernel: hfs buffer overflow

The MITRE CVE dictionary describes this issue as:

Stack-based buffer overflow in the hfs subsystem in the Linux kernel 2.6.32 allows remote attackers to have an unspecified impact via a crafted Hierarchical File System (HFS) filesystem, related to the hfs_readdir function in fs/hfs/dir.c.

Find out more about CVE-2009-4020 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the version of the Linux kernel as shipped with Red Hat Enterprise MRG as the affected driver is not enabled in this kernel. It was addressed in Red Hat Enterprise Linux 4 and 5 via and respectively. Red Hat Enterprise Linux 3 is now in Production 3 of the maintenance life-cycle,, and this issue is rated as having low impact, therefore the fix for this issue is not currently planned to be included in the future updates.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.2
Base Metrics AV:L/AC:H/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity High
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
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 version 5 (kernel) RHSA-2010:0046 2010-01-19
Red Hat Enterprise Linux version 4 (kernel) RHSA-2010:0076 2010-02-02