Updated kernel packages that fix several security issues and bugs in the
Red Hat Enterprise Linux 4 kernel are now available.
This security advisory has been rated as having moderate security impact
by the Red Hat Security Response Team.
The Linux kernel handles the basic functions of the operating system.
These new kernel packages contain fixes for the security issues described
* a flaw in the ISDN CAPI subsystem that allowed a remote user to cause a
denial of service or potential remote access. Exploitation would require
the attacker to be able to send arbitrary frames over the ISDN network to
the victim's machine. (CVE-2007-1217, Moderate)
* a flaw in the perfmon subsystem on ia64 platforms that allowed a local
user to cause a denial of service. (CVE-2006-0558, Moderate)
In addition, the following bugs were addressed:
* a panic after reloading of the LSI Fusion driver.
* a vm performance problem was corrected by balancing inactive page lists.
* added a nodirplus option to address NFSv3 performance issues with large
* changed the personality handling to disallow personality changes of
setuid and setgid binaries. This ensures they keep any randomization and
All Red Hat Enterprise Linux 4 users are advised to upgrade their kernels
to the packages associated with their machine architectures and
configurations as listed in this erratum.