Synopsis
Important: kernel security and bug fix update
Type/Severity
Security Advisory: Important
Topic
An update for kernel is now available for Red Hat Enterprise Linux 7.1 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
- A flaw was found in the way the Linux kernel's networking subsystem handled offloaded packets with multiple layers of encapsulation in the GRO (Generic Receive Offload) code path. A remote attacker could use this flaw to trigger unbounded recursion in the kernel that could lead to stack corruption, resulting in a system crash. (CVE-2016-8666, Important)
Bug Fix(es):
- When a virtual machine (VM) with PCI-Passthrough interfaces was recreated, the operating system rebooted. This update fixes the race condition between the eventfd daemon and the virqfd daemon. As a result, the operating system no longer reboots in the described situation. (BZ#1391609)
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
The system must be rebooted for this update to take effect.
Affected Products
-
Red Hat Enterprise Linux Server - Extended Update Support 7.1 x86_64
-
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.1 s390x
-
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.1 ppc64
-
Red Hat Enterprise Linux EUS Compute Node 7.1 x86_64
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.1 ppc64le
Fixes
- BZ - 1384991 - CVE-2016-8666 kernel: Remotely triggerable recursion in GRE code leading to kernel crash
CVEs
References
Vulmon