| Description: | Summary:
The remote host is missing an update for the 'kernel'
package(s) announced via the referenced advisory.
Vulnerability Insight:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
Security Fix(es):
* It was found that stacking a file system over procfs in the Linux kernel
could lead to a kernel stack overflow due to deep nesting, as demonstrated
by mounting ecryptfs over procfs and creating a recursion by mapping
/proc/environ. An unprivileged, local user could potentially use this flaw
to escalate their privileges on the system. (CVE-2016-1583, Important)
* It was reported that on s390x, the fork of a process with four page table
levels will cause memory corruption with a variety of symptoms. All
processes are created with three level page table and a limit of 4TB for
the address space. If the parent process has four page table levels with a
limit of 8PB, the function that duplicates the address space will try to
copy memory areas outside of the address space limit for the child process.
(CVE-2016-2143, Moderate)
Bug Fix(es):
* Use of a multi-threaded workload with high memory mappings sometimes
caused a kernel panic, due to a race condition between the context switch
and the pagetable upgrade. This update fixes the switch_mm() by using the
complete asce parameter instead of the asce_bits parameter. As a result,
the kernel no longer panics in the described scenario. (BZ#1377472)
* When iptables created the Transmission Control Protocol (TCP) reset
packet, a kernel crash could occur due to uninitialized pointer to the TCP
header within the Socket Buffer (SKB). This update fixes the transport
header pointer in TCP reset for both IPv4 and IPv6, and the kernel no
longer crashes in the described situation.(BZ#1372266)
* Previously, when the Enhanced Error Handling (EEH) mechanism did not
block the PCI configuration space access and an error was detected, a
kernel panic occurred. This update fixes EEH to fix this problem. As a
result, the kernel no longer panics in the described scenario. (BZ#1379596)
* When the lockd service failed to start up completely, the notifier blocks
were in some cases registered on a notification chain multiple times, which
caused the occurrence of a circular list on the notification chain.
Consequently, a soft lock-up or a kernel oops occurred. With this update,
the notifier blocks are unregistered if lockd fails to start up completely,
and the soft lock-ups or the kernel oopses no longer occur under the
described circumstances. (BZ#1375637)
* When the Fibre Channel over Ethernet (FCoE) was configured, the FCoE
MaxFrameSize parameter was in ...
Description truncated, please see the referenced URL(s) for more information.
Affected Software/OS:
kernel on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)
Solution:
Please Install the Updated Packages.
CVSS Score:
7.2
CVSS Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C
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