[El-errata] New Ksplice updates for UEKR5 4.14.35 on OL7 (ELBA-2023-12729)

[Errata Announcements for Oracle Linux]

Synopsis: ELBA-2023-12729 can now be patched using Ksplice
CVEs: CVE-2023-1838 CVE-2023-31084 CVE-2023-3111

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Bug Fix Advisory, ELBA-2023-12729.
More information about this errata can be found at
https://linux.oracle.com/errata/ELBA-2023-12729.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

* CVE-2023-3111: Use-after-free in the Btrfs filesystem when a transaction fails.

An incorrect error handling logic in the Btrfs filesystem when a
transaction fails could lead to a use-after-free.  An attacker could use
this flaw to cause a denial-of-service or potentially escalate its
privileges.


* CVE-2023-31084: Potential deadlock during DVB driver event processing.

An incorrect use of a semaphore can potentially cause a deadlock in the
DVB core driver.  This flaw could be exploited by an unprivileged local
attacker to cause a denial-of-service.


* CVE-2023-1838: Information leak in virtio net driver.

A race condition in the virtio network driver can lead to a
use-after-free scenario.  This flaw could be exploited by a local
attacker to cause a denial-of-service, or to leak privileged information
from kernel memory.

SUPPORT

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