[El-errata] New Ksplice updates for UEKR6 5.4.17 on OL7 and OL8 (ELBA-2023-12344)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2023-12344 can now be patched using Ksplice
CVEs: CVE-2023-1998

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Bug Fix Advisory, ELBA-2023-12344.
More information about this errata can be found at
https://linux.oracle.com/errata/ELBA-2023-12344.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-2023-1998: Information disclosure due to disabled Single Thread Indirect Branch Predictors.

With legacy Indirect Branch Restricted Speculation (IBRS), Single Thread
Indirect Branch Predictors (STIBP) was incorrectly determined to be not
needed. This could allow cross-thread branch target injection and
information disclosure.

Orabug: 35229509

SUPPORT

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