Kernel: Buffer-Overflow, Race Condition, Denial-of-Service Vulnerabilities

Users of kernel please be advised of a buffer-overflow, race condition, denial-of-service Vulnerabilities that has been identified.
To view this vulnerability, possible remedies, and others please check out the Security Advisories at Critical Watch (

RHSA-2010:0907-01: [RHSA-2010:0907-01] kernel buffer-overflow, race condition, denial-of-service

Product: Red Hat Enterprise Linux

Updated kernel packages that fix one security issue and four bugs are now

available for Red Hat Enterprise Linux 5.4 Extended Update Support.

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

This update fixes the following security issue:

* Buffer overflow flaws were found in the Linux kernel’s implementation of
the server-side External Data Representation (XDR) for the Network File
System (NFS) version 4. An attacker on the local network could send a
specially-crafted large compound request to the NFSv4 server, which could
possibly result in a kernel panic (denial of service) or, potentially, code

execution. (CVE-2010-2521, Important)
* A race condition existed when generating new process IDs with the result
that the wrong process could have been signaled or killed accidentally,
leading to various application faults. This update detects and disallows

the reuse of PID numbers. (BZ#638865)