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Ubuntu Security Notice USN-5416-1

Ubuntu Security Notice USN-5416-1
Posted May 12, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5416-1 - Qiuhao Li, Gaoning Pan and Yongkang Jia discovered that the KVM implementation in the Linux kernel did not properly perform guest page table updates in some situations. An attacker in a guest vm could possibly use this to crash the host OS. It was discovered that the implementation of X.25 network protocols in the Linux kernel did not terminate link layer sessions properly. A local attacker could possibly use this to cause a denial of service.

tags | advisory, denial of service, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2022-1158, CVE-2022-1516, CVE-2022-28388, CVE-2022-28389, CVE-2022-28390
SHA-256 | 7fdbee8afc9e35d51c815cc5cf37dff16b83556969d0fb1ee6bfdc2a05f5d92c

Ubuntu Security Notice USN-5416-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-5416-1
May 12, 2022

linux-oem-5.14 vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-oem-5.14: Linux kernel for OEM systems

Details:

Qiuhao Li, Gaoning Pan and Yongkang Jia discovered that the KVM
implementation in the Linux kernel did not properly perform guest page
table updates in some situations. An attacker in a guest vm could possibly
use this to crash the host OS. (CVE-2022-1158)

It was discovered that the implementation of X.25 network protocols in
the Linux kernel did not terminate link layer sessions properly. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2022-1516)

It was discovered that the 8 Devices USB2CAN interface implementation
in the Linux kernel did not properly handle certain error conditions,
leading to a double-free. A local attacker could possibly use this to
cause a denial of service (system crash). (CVE-2022-28388)

It was discovered that the Microchip CAN BUS Analyzer interface
implementation in the Linux kernel did not properly handle certain error
conditions, leading to a double-free. A local attacker could possibly
use this to cause a denial of service (system crash). (CVE-2022-28389)

It was discovered that the EMS CAN/USB interface implementation in the
Linux kernel contained a double-free vulnerability when handling certain
error conditions. A local attacker could use this to cause a denial of
service (memory exhaustion). (CVE-2022-28390)

Update instructions:

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

Ubuntu 20.04 LTS:
linux-image-5.14.0-1036-oem 5.14.0-1036.40
linux-image-oem-20.04 5.14.0.1036.33
linux-image-oem-20.04b 5.14.0.1036.33
linux-image-oem-20.04c 5.14.0.1036.33
linux-image-oem-20.04d 5.14.0.1036.33

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-5416-1
CVE-2022-1158, CVE-2022-1516, CVE-2022-28388, CVE-2022-28389,
CVE-2022-28390

Package Information:
https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1036.40
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