Public Date:
539435: CVE-2009-4005 kernel: isdn: hfc_usb: fix read buffer overflow

The MITRE CVE dictionary describes this issue as:

The collect_rx_frame function in drivers/isdn/hisax/hfc_usb.c in the Linux kernel before 2.6.32-rc7 allows attackers to have an unspecified impact via a crafted HDLC packet that arrives over ISDN and triggers a buffer under-read.

Find out more about CVE-2009-4005 from the MITRE CVE dictionary dictionary and NIST NVD.


The Linux kernel as shipped with Red Hat Enterprise Linux 3, 5, and Red Hat Enterprise MRG did not include support for the HiSax ISDN driver for Colognechip HFC-S USB chip, and therefore were not affected by this issue.

Issue was addressed in Red Hat Enterprise Linux 4 via

CVSS v2 metrics

Base Score 7.1
Base Metrics AV:N/AC:M/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Medium
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 4 (kernel) RHSA-2010:0076 2010-02-02

Last Modified

CVE description copyright © 2017, The MITRE Corporation