[El-errata] New Ksplice updates for UEKR4 4.1.12 on OL6 and OL7 (ELSA-2022-9014)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2022-9014 can now be patched using Ksplice
CVEs: CVE-2021-0920 CVE-2021-1048 CVE-2021-4083 CVE-2021-4155

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2022-9014.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2022-9014.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR4 4.1.12 on
OL6 and 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

* CVE-2021-4155: Data leak in XFS filesystem.

The XFS filesystem does not correctly initialize certain data blocks. This
could allow data leaks to unprivileged users.

Orabug: 33703630


* CVE-2021-1048: Use-after-free in the filesystem event poll mechanism.

A race condition in the filesystem event poll mechanism can lead to a
use-after-free.  A local unprivileged user could use this flaw to cause a
denial-of-service or potentially escalate privileges.

Orabug: 33679854


* CVE-2021-0920, CVE-2021-4083: Privilege escalation in BSD Unix domain 
sockets.

Lack of synchronization in BSD Unix domain sockets module could result 
in a use
after free error. A local user could use this flaw to cause 
denial-of-service
or privileges escalation.

Orabug: 33679806

SUPPORT

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