CentOS Update for kernel CESA-2016:0185 centos7

Published: 2016-02-17 05:27:32
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C

Detection Type:
Linux Distribution Package

Summary:
Check the version of kernel

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
The kernel Linux Distribution Packages contain the Linux kernel, the core of any Linux operating system. * It was found that the Linux kernel's keys subsystem did not correctly garbage collect uninstantiated keyrings. A local attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2015-7872, Important) * A flaw was found in the way the Linux kernel handled IRET faults during the processing of NMIs. An unprivileged, local user could use this flaw to crash the system or, potentially (although highly unlikely), escalate their privileges on the system. (CVE-2015-5157, Moderate) This update also fixes the following bugs: * Previously, processing packets with a lot of different IPv6 source addresses caused the kernel to return warnings concerning soft-lockups due to high lock contention and latency increase. With this update, lock contention is reduced by backing off concurrent waiting threads on the lock. As a result, the kernel no longer issues warnings in the described scenario. (BZ#1285370) * Prior to this update, block device readahead was artificially limited. As a consequence, the read performance was poor, especially on RAID devices. Now, per-device readahead limits are used for each device instead of a global limit. As a result, read performance has improved, especially on RAID devices. (BZ#1287550) * After injecting an EEH error, the host was previously not recovering and observing I/O hangs in HTX tool logs. This update makes sure that when one or both of EEH_STATE_MMIO_ACTIVE and EEH_STATE_MMIO_ENABLED flags is marked in the PE state, the PE's IO path is regarded as enabled as well. As a result, the host no longer hangs and recovers as expected. (BZ#1289101) * The genwqe device driver was previously using the GFP_ATOMIC flag for allocating consecutive memory pages from the kernel's atomic memory pool, even in non-atomic situations. This could lead to allocation failures during memory pressure. With this update, the genwqe driver's memory allocations use the GFP_KERNEL flag, and the driver can allocate memory even during memory pressure situations. (BZ#1289450) * The nx842 co-processor for IBM Power Systems could in some circumstances provide invalid data due to a data corruption bug during uncompression. With this update, all compression and uncompression calls to the nx842 co-processor contain a cyclic redundancy check (CRC) flag, which forces all compression and uncompression operations to check data integrity and prevents the co-processor from providing corrupted data. (BZ#1289451) * A failed 'updatepp' operation on the little-endian variant o ... Description truncated, please see the referenced URL(s) for more information.

Affected Versions:
kernel on CentOS 7

Recommendations:
Please install the updated Linux Distribution Packages.

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2015-5157
https://nvd.nist.gov/vuln/detail/CVE-2015-7872

References:

http://lists.centos.org/pipermail/centos-announce/2016-February/021705.html

Severity
High
CVSS Score
7.2
Published
2016-02-17
Modified
2019-03-08
Category
CentOS Local Security Checks

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