[El-errata] New Ksplice updates for UEKR6 5.4.17 on OL7 and OL8 (ELSA-2021-9486)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2021-9486 can now be patched using Ksplice
CVEs: CVE-2020-16119 CVE-2020-29372 CVE-2021-28951 CVE-2021-29657 CVE-2021-3491

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2021-9486.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2021-9486.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR6 5.4.17 on
OL7 and OL8 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

* Denial-of-service in block device subsystem.

A logic error whilst removing a gendisk device may lead to a deadlock
in the block device subsystem.  This could cause an denial-of-service.


Orabug: 33396355


* CVE-2020-29372: Denial-of-service in Memory Management subsystem due to a race condition.

A race condition in Memory Management subsystem could result in loss
of availability. A local user could use this flaw to cause
a denial-of-service.

Orabug: 33042559


* Note: Oracle has determined that CVE-2020-16119 is not applicable.

Oracle has determined that CVE-2020-16119 is not applicable to
the running kernel. Applying the patch has no resulting changes
in the generated object files.

Orabug: 33408808


* Note: Oracle has determined that CVE-2021-3491 is not applicable.

Oracle has determined that CVE-2021-3491 is not applicable to the
running kernel. The vulnerable patch was introduced only starting
from 5.4.17-2136.300.7 kernel version.

Orabug: 33042559


* Note: Oracle has determined that CVE-2021-28951 is not applicable.

Oracle has determined that CVE-2021-28951 is not applicable to the
running kernel. The vulnerable patch was introduced only starting
from 5.4.17-2136.300.7 kernel version.

Orabug: 33042559


* Note: Oracle has determined that CVE-2021-29657 is not applicable.

Oracle has determined that CVE-2021-29657 is not applicable to the
running kernel. The vulnerable patch was introduced only starting
from 5.4.17-2136.300.7 kernel version.

Orabug: 32490237

SUPPORT

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