RHEL 7 : kernel-rt (RHSA-2015:1977)

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.

Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated kernel-rt packages that fix two security issues, several bugs,
and add one enhancement are now available for Red Hat Enterprise Linux

Red Hat Product Security has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

* A flaw was found in the way the Linux kernel's VFS subsystem handled
file system locks. A local, unprivileged user could use this flaw to
trigger a deadlock in the kernel, causing a denial of service on the
system. (CVE-2014-8559, Moderate)

* A buffer overflow flaw was found in the way the Linux kernel's
virtio-net subsystem handled certain fraglists when the GRO (Generic
Receive Offload) functionality was enabled in a bridged network
configuration. An attacker on the local network could potentially use
this flaw to crash the system, or, although unlikely, elevate their
privileges on the system. (CVE-2015-5156, Moderate)

The CVE-2015-5156 issue was discovered by Jason Wang of Red Hat.

The kernel-rt packages have been upgraded to version 3.10.0-229.20.1,
which provides a number of bug fixes and enhancements over the
previous version, including :

* Unexpected completion is detected on Intel Ethernet x540

* Divide by zero error in intel_pstate_timer_func() [ inline s64
div_s64_rem() ]

* NFS Recover from stateid-type error on SETATTR

* pNFS RHEL 7.1 Data Server connection remains after umount due to
lseg refcount leak

* Race during NFS v4.0 recovery and standard IO.

* Fix ip6t_SYNPROXY for namespaces and connection delay

* synproxy window size and sequence number behaviour causes long
connection delay

* Crash in kmem_cache_alloc() during disk stress testing (using ipr)

* xfs: sync/backport to upstream v4.1

* iscsi_session recovery_tmo revert back to default when a path
becomes active

* read from MD raid1 can fail if read from resync target fails

* backport scsi-mq

* unable to handle kernel paging request at 0000000000237037 [zswap]


All kernel-rt users are advised to upgrade to these updated packages,
which correct these issues and add this enhancement. The system must
be rebooted for this update to take effect.

See also :


Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.1

Family: Red Hat Local Security Checks

Nessus Plugin ID: 86717 ()

Bugtraq ID:

CVE ID: CVE-2014-8559

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