[RHSA-2015:1042-01] Important: kernel security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel security and bug fix update

Advisory ID: RHSA-2015:1042-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1042.html

Issue date: 2015-06-02

CVE Names: CVE-2015-1805

=====================================================================

 

1. Summary:

 

Updated kernel packages that fix one security issue and several bugs are

now available for Red Hat Enterprise Linux 5.

 

Red Hat Product Security has rated this update as having Important security

impact. A Common Vulnerability Scoring System (CVSS) base score, which

gives a detailed severity rating, is available from the CVE link in the

References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, x86_64

 

3. Description:

 

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

operating system.

 

* It was found that the Linux kernel's implementation of vectored pipe read

and write functionality did not take into account the I/O vectors that were

already processed when retrying after a failed atomic access operation,

potentially resulting in memory corruption due to an I/O vector array

overrun. A local, unprivileged user could use this flaw to crash the system

or, potentially, escalate their privileges on the system. (CVE-2015-1805,

Important)

 

The security impact of this issue was discovered by Red Hat.

 

This update fixes the following bugs:

 

* Due to a bug in the lpfc_device_reset_handler() function, a scsi command

timeout could lead to a system crash. With this update,

lpfc_device_reset_handler recovers storage without crashing. (BZ#1070964)

 

* Due to the code decrementing the reclaim_in_progress counter without

having incremented it first, severe spinlock contention occurred in the

shrink_zone() function even though the vm.max_reclaims_in_progress feature

was set to 1. This update provides a patch fixing the underlying source

code, and spinlock contention no longer occurs in this scenario.

(BZ#1164105)

 

* A TCP socket using SACK that had a retransmission but recovered from it,

failed to reset the retransmission timestamp. As a consequence, on certain

connections, if a packet had to be re-transmitted, the retrans_stamp

variable was only cleared when the next acked packet was received.

This could lead to an early abortion of the TCP connection if this next

packet also got lost. With this update, the socket clears retrans_stamp

when the recovery is completed, thus fixing the bug. (BZ#1205521)

 

* Previously, the signal delivery paths did not clear the TS_USEDFPU flag,

which could cause problems in the switch_to() function and lead to

floating-point unit (FPU) corruption. With this update, TS_USEDFPU is

cleared as expected, and FPU is no longer under threat of corruption.

(BZ#1193505)

 

* A race condition in the exit_sem() function previously caused the

semaphore undo list corruption. As a consequence, a kernel crash could

occur. The corruption in the semaphore undo list has been fixed, and the

kernel no longer crashes in this situation. (BZ#1124574)

 

* Previously, when running the "virsh blockresize [Device] [Newsize]"

command to resize the disk, the new size was not reflected in a Red Hat

Enterprise Linux 5 Virtual Machine (VM). With this update, the new size is

now reflected online immediately in a Red Hat Enterprise Linux 5 VM so it

is no longer necessary to reboot the VM to see the new disk size.

(BZ#1200855)

 

All kernel users are advised to upgrade to these updated packages, which

contain backported patches to correct these issues. The system must be

rebooted for this update to take effect.

 

4. Solution:

 

Before applying this update, make sure all previously released errata

relevant to your system have been applied.

 

For details on how to apply this update, refer to:

 

https://access.redhat.com/articles/11258

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1202855 - CVE-2015-1805 kernel: pipe: iovec overrun leading to memory corruption

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 5 client):

 

Source:

kernel-2.6.18-406.el5.src.rpm

 

i386:

kernel-2.6.18-406.el5.i686.rpm

kernel-PAE-2.6.18-406.el5.i686.rpm

kernel-PAE-debuginfo-2.6.18-406.el5.i686.rpm

kernel-PAE-devel-2.6.18-406.el5.i686.rpm

kernel-debug-2.6.18-406.el5.i686.rpm

kernel-debug-debuginfo-2.6.18-406.el5.i686.rpm

kernel-debug-devel-2.6.18-406.el5.i686.rpm

kernel-debuginfo-2.6.18-406.el5.i686.rpm

kernel-debuginfo-common-2.6.18-406.el5.i686.rpm

kernel-devel-2.6.18-406.el5.i686.rpm

kernel-headers-2.6.18-406.el5.i386.rpm

kernel-xen-2.6.18-406.el5.i686.rpm

kernel-xen-debuginfo-2.6.18-406.el5.i686.rpm

kernel-xen-devel-2.6.18-406.el5.i686.rpm

 

noarch:

kernel-doc-2.6.18-406.el5.noarch.rpm

 

x86_64:

kernel-2.6.18-406.el5.x86_64.rpm

kernel-debug-2.6.18-406.el5.x86_64.rpm

kernel-debug-debuginfo-2.6.18-406.el5.x86_64.rpm

kernel-debug-devel-2.6.18-406.el5.x86_64.rpm

kernel-debuginfo-2.6.18-406.el5.x86_64.rpm

kernel-debuginfo-common-2.6.18-406.el5.x86_64.rpm

kernel-devel-2.6.18-406.el5.x86_64.rpm

kernel-headers-2.6.18-406.el5.x86_64.rpm

kernel-xen-2.6.18-406.el5.x86_64.rpm

kernel-xen-debuginfo-2.6.18-406.el5.x86_64.rpm

kernel-xen-devel-2.6.18-406.el5.x86_64.rpm

 

Red Hat Enterprise Linux (v. 5 server):

 

Source:

kernel-2.6.18-406.el5.src.rpm

 

i386:

kernel-2.6.18-406.el5.i686.rpm

kernel-PAE-2.6.18-406.el5.i686.rpm

kernel-PAE-debuginfo-2.6.18-406.el5.i686.rpm

kernel-PAE-devel-2.6.18-406.el5.i686.rpm

kernel-debug-2.6.18-406.el5.i686.rpm

kernel-debug-debuginfo-2.6.18-406.el5.i686.rpm

kernel-debug-devel-2.6.18-406.el5.i686.rpm

kernel-debuginfo-2.6.18-406.el5.i686.rpm

kernel-debuginfo-common-2.6.18-406.el5.i686.rpm

kernel-devel-2.6.18-406.el5.i686.rpm

kernel-headers-2.6.18-406.el5.i386.rpm

kernel-xen-2.6.18-406.el5.i686.rpm

kernel-xen-debuginfo-2.6.18-406.el5.i686.rpm

kernel-xen-devel-2.6.18-406.el5.i686.rpm

 

ia64:

kernel-2.6.18-406.el5.ia64.rpm

kernel-debug-2.6.18-406.el5.ia64.rpm

kernel-debug-debuginfo-2.6.18-406.el5.ia64.rpm

kernel-debug-devel-2.6.18-406.el5.ia64.rpm

kernel-debuginfo-2.6.18-406.el5.ia64.rpm

kernel-debuginfo-common-2.6.18-406.el5.ia64.rpm

kernel-devel-2.6.18-406.el5.ia64.rpm

kernel-headers-2.6.18-406.el5.ia64.rpm

kernel-xen-2.6.18-406.el5.ia64.rpm

kernel-xen-debuginfo-2.6.18-406.el5.ia64.rpm

kernel-xen-devel-2.6.18-406.el5.ia64.rpm

 

noarch:

kernel-doc-2.6.18-406.el5.noarch.rpm

 

ppc:

kernel-2.6.18-406.el5.ppc64.rpm

kernel-debug-2.6.18-406.el5.ppc64.rpm

kernel-debug-debuginfo-2.6.18-406.el5.ppc64.rpm

kernel-debug-devel-2.6.18-406.el5.ppc64.rpm

kernel-debuginfo-2.6.18-406.el5.ppc64.rpm

kernel-debuginfo-common-2.6.18-406.el5.ppc64.rpm

kernel-devel-2.6.18-406.el5.ppc64.rpm

kernel-headers-2.6.18-406.el5.ppc.rpm

kernel-headers-2.6.18-406.el5.ppc64.rpm

kernel-kdump-2.6.18-406.el5.ppc64.rpm

kernel-kdump-debuginfo-2.6.18-406.el5.ppc64.rpm

kernel-kdump-devel-2.6.18-406.el5.ppc64.rpm

 

s390x:

kernel-2.6.18-406.el5.s390x.rpm

kernel-debug-2.6.18-406.el5.s390x.rpm

kernel-debug-debuginfo-2.6.18-406.el5.s390x.rpm

kernel-debug-devel-2.6.18-406.el5.s390x.rpm

kernel-debuginfo-2.6.18-406.el5.s390x.rpm

kernel-debuginfo-common-2.6.18-406.el5.s390x.rpm

kernel-devel-2.6.18-406.el5.s390x.rpm

kernel-headers-2.6.18-406.el5.s390x.rpm

kernel-kdump-2.6.18-406.el5.s390x.rpm

kernel-kdump-debuginfo-2.6.18-406.el5.s390x.rpm

kernel-kdump-devel-2.6.18-406.el5.s390x.rpm

 

x86_64:

kernel-2.6.18-406.el5.x86_64.rpm

kernel-debug-2.6.18-406.el5.x86_64.rpm

kernel-debug-debuginfo-2.6.18-406.el5.x86_64.rpm

kernel-debug-devel-2.6.18-406.el5.x86_64.rpm

kernel-debuginfo-2.6.18-406.el5.x86_64.rpm

kernel-debuginfo-common-2.6.18-406.el5.x86_64.rpm

kernel-devel-2.6.18-406.el5.x86_64.rpm

kernel-headers-2.6.18-406.el5.x86_64.rpm

kernel-xen-2.6.18-406.el5.x86_64.rpm

kernel-xen-debuginfo-2.6.18-406.el5.x86_64.rpm

kernel-xen-devel-2.6.18-406.el5.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2015-1805

https://access.redhat.com/security/updates/classification/#important

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2015 Red Hat, Inc.

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