Public Date:
652957: CVE-2010-4163 CVE-2010-4668 kernel: panic when submitting certain 0-length I/O requests

The MITRE CVE dictionary describes this issue as:

The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before allows local users to cause a denial of service (panic) via a zero-length I/O request in a device ioctl to a SCSI device.

Find out more about CVE-2010-4163 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4 and 5 as they did not backport the upstream commit c5dec1c3 that introduced the issue. This has been addressed in Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG via and

CVSS v2 metrics

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

Base Score 4.7
Base Metrics AV:L/AC:M/Au:N/C:N/I:N/A:C
Access Vector Local
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 version 6 (kernel) RHSA-2011:0007 2011-01-11
MRG Grid for RHEL 5 Server (kernel-rt) RHSA-2011:0330 2011-03-10


Red Hat would like to thank Dan Rosenberg for reporting this issue.