A Linux kernel (Intel IoTG) security update has been released for Ubuntu Linux 20.04 LTS and 22.04 LTS.

[USN-6516-1] Linux kernel (Intel IoTG) vulnerabilities

==========================================================================
Ubuntu Security Notice USN-6516-1
November 27, 2023

linux-intel-iotg, linux-intel-iotg-5.15 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-intel-iotg: Linux kernel for Intel IoT platforms
- linux-intel-iotg-5.15: Linux kernel for Intel IoT platforms

Details:

Ivan D Barrera, Christopher Bednarz, Mustafa Ismail, and Shiraz Saleem
discovered that the InfiniBand RDMA driver in the Linux kernel did not
properly check for zero-length STAG or MR registration. A remote attacker
could possibly use this to execute arbitrary code. (CVE-2023-25775)

Yu Hao and Weiteng Chen discovered that the Bluetooth HCI UART driver in
the Linux kernel contained a race condition, leading to a null pointer
dereference vulnerability. A local attacker could use this to cause a
denial of service (system crash). (CVE-2023-31083)

Yu Hao discovered that the UBI driver in the Linux kernel did not properly
check for MTD with zero erasesize during device attachment. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-31085)

Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the
Linux kernel contained a null pointer dereference vulnerability in some
situations. A local privileged attacker could use this to cause a denial of
service (system crash). (CVE-2023-3772)

Manfred Rudigier discovered that the Intel(R) PCI-Express Gigabit (igb)
Ethernet driver in the Linux kernel did not properly validate received
frames that are larger than the set MTU size, leading to a buffer overflow
vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-45871)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
linux-image-5.15.0-1045-intel-iotg 5.15.0-1045.51
linux-image-intel-iotg 5.15.0.1045.45

Ubuntu 20.04 LTS:
linux-image-5.15.0-1045-intel-iotg 5.15.0-1045.51~20.04.1
linux-image-intel 5.15.0.1045.51~20.04.35
linux-image-intel-iotg 5.15.0.1045.51~20.04.35

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
https://ubuntu.com/security/notices/USN-6516-1
CVE-2023-25775, CVE-2023-31083, CVE-2023-31085, CVE-2023-3772,
CVE-2023-45871

Package Information:
https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1045.51

https://launchpad.net/ubuntu/+source/linux-intel-iotg-5.15/5.15.0-1045.51~20.04.1