The remote Red Hat host is missing one or more security updates.
Updated kernel packages that fix three security issues, several bugs,
and add two enhancements are now available for Red Hat Enterprise
The Red Hat Security Response Team has rated this update as having
moderate security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.
The kernel packages contain the Linux kernel, the core of any Linux
This update fixes the following security issues :
* A divide-by-zero flaw was found in the tcp_select_initial_window()
function in the Linux kernel's TCP/IP protocol suite implementation. A
local, unprivileged user could use this flaw to trigger a denial of
service by calling setsockopt() with certain options. (CVE-2010-4165,
* A use-after-free flaw in the mprotect() system call in the Linux
kernel could allow a local, unprivileged user to cause a local denial
of service. (CVE-2010-4169, Moderate)
* A flaw was found in the Linux kernel execve() system call
implementation. A local, unprivileged user could cause large amounts
of memory to be allocated but not visible to the OOM (Out of Memory)
killer, triggering a denial of service. (CVE-2010-4243, Moderate)
Red Hat would like to thank Steve Chen for reporting CVE-2010-4165,
and Brad Spengler for reporting CVE-2010-4243.
This update also fixes several bugs and adds two enhancements.
Documentation for these bug fixes and enhancements will be available
shortly from the Technical Notes document linked to in the References
Users should upgrade to these updated packages, which contain
backported patches to correct these issues, and fix the bugs and add
the enhancements noted in the Technical Notes. The system must be
rebooted for this update to take effect.
See also :
Update the affected packages.
Risk factor :
Medium / CVSS Base Score : 4.9
CVSS Temporal Score : 4.3
Public Exploit Available : true