[Ksplice][Ubuntu-Oracle-Updates] New Ksplice updates for Ubuntu OCI kernel (USN-5044-1)

[Oracle Ksplice]

Synopsis: USN-5044-1 can now be patched using Ksplice
CVEs: CVE-2019-19036 CVE-2021-3564 CVE-2021-3573 CVE-2021-3587

Systems running Ubuntu OCI kernel can now use Ksplice to patch against
the latest Ubuntu Security Notice, USN-5044-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu OCI
kernel 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-2021-3587: Denial-of-service when calling sockname() on NFC socket.

If an NFC socket fails to bind, calling getsockname() will result in a
NULL pointer deference. A local, unprivileged user might exploit this to
cause a denial-of-service.


* CVE-2021-3564: Use-after-free when initializing bluetooth HCI device.

A flaw in the bluetooth Host Controller Interface handling could result
in a use-after-free if a device fails initialization. A malicious local
device or user might exploit this to cause a denial-of-service.


* Improved fix to CVE-2019-19036: Denial-of-service in btrfs file system.

Improper validation of file system metadata in the btrfs file system
could lead to a system crash in some situations.  An attacker could use
this flaw to construct a malicious btrfs image that, when mounted,
could cause a denial-of-service.


* CVE-2021-3573: Code execution in the bluetooth subsystem due to use-after-free.

Improper handling of HCI device detach events in the bluetooth subsystem
could leading to a use-after-free. A local user could use this flaw to
cause a denial of service or possibly execute arbitrary code.

SUPPORT

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