[El-errata] New Ksplice updates for UEKR5 4.14.35 on OL7 (ELBA-2019-4781)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2019-4781 can now be patched using Ksplice
CVEs: CVE-2018-18445

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Bug Fix Advisory, ELBA-2019-4781.
More information about this errata can be found at
https://linux.oracle.com/errata/ELBA-2019-4781.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR5 4.14.35
on OL7 install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* Kernel IO hang during directory entry cache shrinking.

Missing scheduler calls when performing directory entry cache shrinking
could result in an IO stall and subsequent kernel hang under heavy IO
load.

Orabug: 30184078


* Use-after-free in Xen network backend receive path.

Incorrect locking could result in races between interrupts when
processing received data leading to a use-after-free and potential
kernel crash.

Orabug: 30213575


* SUNRPC failure during NFS secure unmounting.

Incorrect error handling could result in unhandled errors in the
SUNRPC subsystem and subsequent I/O failures.

Orabug: 30149094


* Memory leak when freeing NVMe subsystem.

A logic error when releasing a NVMe subsystem could lead to a memory
leak. A local attacker could use this flaw to exhaust kernel memory and
cause a denial-of-service.

Orabug: 30110730


* NULL pointer dereference when using NVMe multipath with ANA deactivated.

A missing check when using NVMe multipath with ANA deactivated could
lead to a NULL pointer dereference. A local attacker could use this flaw
to cause a denial-of-service.

Orabug: 30110730


* Multiple use-after-free in NVMe subsystem.

Multiple logic errors in the NVMe subsystem could lead to
use-after-frees. A local attacker could use these flaws to cause a
denial-of-service.

Orabug: 30110730

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.