[El-errata] New Ksplice updates for UEKR6 5.4.17 on OL7 and OL8 (ELBA-2022-9093)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2022-9093 can now be patched using Ksplice
CVEs: CVE-2021-4034

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Bug Fix Advisory, ELBA-2022-9093.
More information about this errata can be found at
https://linux.oracle.com/errata/ELBA-2022-9093.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

* CVE-2021-4034: Privilege escalation in pkexec.

Incorrect input validation in the pkexec program (part of Polkit) allows
any local user to become root.


* Delays in realtime scheduling or network traffic handling tasks.

IRQ work was not handled promptly and inadvertently skipped in
flush_smp_call_function_queue() function when no remote SMP calls were
scheduled. This could manifest itself with delays for time-sensitive
tasks such as realtime scheduling or network traffic handling. This was
fixed now by always processing IRQ work.

Orabug: 33770816

SUPPORT

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