Security Advisory Moderate: kernel-rt security and bug fix update

Advisory: RHSA-2012:1150-1
Type: Security Advisory
Severity: Moderate
Issued on: 2012-08-08
Last updated on: 2012-08-08
Affected Products: Red Hat Enterprise MRG v2 for Red Hat Enterprise Linux (version 6)
CVEs ( CVE-2012-2390


Updated kernel-rt packages that fix two security issues and two bugs are
now available for Red Hat Enterprise MRG 2.1.

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-rt packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issues:

* A memory leak flaw was found in the way the Linux kernel's memory
subsystem handled resource clean up in the mmap() failure path when the
MAP_HUGETLB flag was set. A local, unprivileged user could use this flaw to
cause a denial of service. (CVE-2012-2390, Moderate)

* A flaw was found in the way the Linux kernel's Event Poll (epoll)
subsystem handled resource clean up when an ELOOP error code was returned.
A local, unprivileged user could use this flaw to cause a denial of
service. (CVE-2012-3375, Moderate)

This update also fixes the following bugs:

* The MRG 2.1 realtime kernel lacked support for automatic memory
reservation for the kdump kernel, as present in Red Hat Enterprise Linux
kernels. Using the parameter crashkernel=auto on the kernel boot command
line led to kdump being disabled because no memory was correctly reserved.
Support for crashkernel=auto has been implemented in the 3.0 realtime
kernel and now when the crashkernel=auto parameter is specified, machines
with more than 4GB of RAM have the amount of memory required by the kdump
kernel calculated and reserved. (BZ#820427)

* The current bnx2x driver in the MRG 2.1 realtime kernel had faulty
support for the network adapter PCI ID 14e4:168e and did not work
correctly. The bnx2x driver was updated to include support for this network
adapter. (BZ#839037)

Users should upgrade to these updated packages, which upgrade the kernel-rt
kernel to version kernel-rt-3.0.36-rt57, and correct these issues. The
system must be rebooted for this update to take effect.


Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at

To install kernel packages manually, use "rpm -ivh [package]". Do not
use "rpm -Uvh" as that will remove the running kernel binaries from
your system. You may use "rpm -e" to remove old kernels after
determining that the new kernel functions properly on your system.

Updated packages

Red Hat Enterprise MRG v2 for Red Hat Enterprise Linux (version 6)

File outdated by:  RHSA-2017:1647
    MD5: 3a4057173eb8702e811a15f1770c76b8
SHA-256: f549dfc4d9c9620506bdbc9302479225586b90a21d1f0e4748f91e9d7b58ab06
File outdated by:  RHSA-2017:1647
    MD5: 393f7b3e4d2c730f365a5eba1421d92f
SHA-256: d4eee595a0b3bcb041630fcffe496d7642b15682c7941f2a66fe4d0dc15f4a9e
File outdated by:  RHSA-2017:1647
    MD5: 362b9a68cb55675a64268fc98f8b6f3b
SHA-256: 1768b6e8eadf2a544bab030c0d89b225bf892a4586e921d2eaa09b36fb50ced5
File outdated by:  RHSA-2017:1647
    MD5: 4543db39955e8012ccc5abda166d717e
SHA-256: 0dc8b4a26c9c13b448cee060254192cb62ab67e227d001b13039e178f8bc6b7f
File outdated by:  RHSA-2017:1647
    MD5: 63c43fe3f00e64343584ac3e551876d9
SHA-256: f594f991c46353a1e636e9611692b4248a14717df18787945c7a38725399f786
File outdated by:  RHSA-2017:1647
    MD5: b2c6d1b40bf8ad017f005bc0253d67cb
SHA-256: eff474fb4b3b265273fd0d33e1fd5327533cdcbde723c8482ae96a6168eecc99
File outdated by:  RHSA-2017:1647
    MD5: 0f63bd9eef1278481594f9d1b6059a74
SHA-256: 9207a7a0e42ac0070156c459bd03de8950cea5966c6a2ef92d16fc371726be82
File outdated by:  RHSA-2017:1647
    MD5: 87060ca4d23e3e547bcd29fb17a8725e
SHA-256: e5db57c6090c67945a5002c22fc5bb4ed1f9bf3aa61c67ff164ea9287d4af4c6
File outdated by:  RHSA-2017:1647
    MD5: 89ec2a2fe779141a2c2669c8d200803b
SHA-256: 1f43e5e1564561b2aa3b0f7cc48340633ca2397601592315bfcf450a8aa48314
File outdated by:  RHSA-2017:1647
    MD5: 4a85a2a9fa2aed5c9f9c1c63a1ec1fbd
SHA-256: 7b73797962daa711db00578e60e8d65334091bf01a74e0041266ccc6ed8519b4
File outdated by:  RHSA-2017:1647
    MD5: ddb4fea1928a897e993b0c75421464aa
SHA-256: 1f702a9604b68f377a5bba8a5ab07dd23804c0b14945d10f32286e569cca14f7
File outdated by:  RHSA-2017:1647
    MD5: 56771419fa1c33045468914e18335017
SHA-256: 9e9390c58d933bc1f672df8e8f70c7d568127fd400134c8883e96927b4ce75d3
File outdated by:  RHSA-2017:1647
    MD5: bc5ab048da35515475e1361a6a16d23c
SHA-256: 3986e0760f78532b69c8cbc328f5df679155d17cf8748688248daae2dfa1d1d1
File outdated by:  RHSA-2017:1647
    MD5: d4a7f5bb553c73e0c6eb20ac22f774e0
SHA-256: bab24d4e383848a729f73c13a207d1e14676dd1bb32d1f620d260a600fa8a14c
File outdated by:  RHSA-2017:1647
    MD5: 94f4554d99f202f40b5176647d5a4f55
SHA-256: e21bddb987545c2b36a5be8ba3dca0886a961a3710a0855d4e6494df2c7440df
File outdated by:  RHSA-2017:1647
    MD5: bf5e5fb1348a686379f1efd0ddb659ae
SHA-256: 84fe99b1fda27c2d46d072f96ccea69cf23ceeb54e70f10f53916c28eed885a5
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

824345 - CVE-2012-2390 kernel: huge pages: memory leak on mmap failure
837502 - CVE-2012-3375 kernel: epoll: can leak file descriptors when returning -ELOOP


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:

The Red Hat security contact is More contact details at