CentOS Update for kernel CESA-2016:1277 centos7

Check the version of kernel

The kernel packages contain the Linux kernel, the core of any Linux operating system. These updated kernel packages include several security issues and numerous bug fixes, some of which you can see below. Space precludes documenting all of these bug fixes in this advisory. To see the complete list of bug fixes, users are directed to the referenced Knowledge Article. Security Fixes: * A flaw was found in the way certain interfaces of the Linux kernel's Infiniband subsystem used write() as bi-directional ioctl() replacement, which could lead to insufficient memory security checks when being invoked using the splice() system call. A local unprivileged user on a system with either Infiniband hardware present or RDMA Userspace Connection Manager Access module explicitly loaded, could use this flaw to escalate their privileges on the system. (CVE-2016-4565, Important) * A race condition flaw was found in the way the Linux kernel's SCTP implementation handled sctp_accept() during the processing of heartbeat timeout events. A remote attacker could use this flaw to prevent further connections to be accepted by the SCTP server running on the system, resulting in a denial of service. (CVE-2015-8767, Moderate) Red Hat would like to thank Jann Horn for reporting CVE-2016-4565. Bug Fixes: * When Small Computer System Interface (SCSI) devices were removed or deleted, a system crash could occur due to a race condition between listing all SCSI devices and SCSI device removal. The provided patch ensures that the starting node for the klist_iter_init_node() function is actually a member of the list before using it. As a result, a system crash no longer occurs in the described scenario. (BZ#1333403) * This update offers a reworked series of patches for the resizable hash table (rhashtable) including a number of backported bug fixes and enhancements from upstream. (BZ#1328801) * Previously, the same value of the mperf Model-Specific Register (MSR) read twice in a row could lead to a kernel panic due to the divide-by-zero error. The provided patch fixes this bug, and the kernel now handles two identical values of mperf gracefully. (BZ#1334438) * When a transparent proxy application was running and the number of established connections on the computer exceeded one million, unrelated processes, such as curl or ssh, were unable to bind to a local IP on the box to initiate a connection. The provided patch fixes the cooperation of the REUSEADDR/NOREUSEADDR socket option, and thus prevents the local por ... Description truncated, please see the referenced URL(s) for more information.

kernel on CentOS 7

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

Please Install the Updated Packages.