QID 198377

Usn-4945-1 fixed vulnerabilities in the linux kernel for ubuntu 20.04 lts and ubuntu 18.04 lts. The nouveau gpu driver in the linux kernel did not properly handle error conditions in some situations.
The xen netback backend in the linux kernel did not properly handle certain error conditions under paravirtualization.
The fastrpc driver in the linux kernel did not prevent user space applications from sending kernel rpc messages.
The realtek rtl8188eu wireless device driver in the linux kernel did not properly validate ssid lengths in some situations.
The usb/ip driver in the linux kernel contained race conditions during the update of local and shared status.
A race condition existed in the netfilter subsystem of the linux kernel when replacing tables.
The video4linux subsystem in the linux kernel did not properly deallocate memory in some situations.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

This update provides the corresponding linux kernel updates targeted specifically for raspberry pi devices in those same ubuntu releases.
A local attacker could use this to cause a denial of service (system crash) (cve-2020-25639).
An attacker in a guest vm could possibly use this to cause a denial of service (host domain crash) (cve-2021-28038).
A local attacker could possibly use this to gain elevated privileges.
(cve-2021-28375).
An attacker could use this to cause a denial of service (system crash).
(cve-2021-28660).
An attacker could use this to cause a denial of service (system crash) (cve-2021-29265).
A local attacker could use this to cause a denial of service (system crash) (cve-2021-29650).
A local attacker could use this to cause a denial of service (memory exhaustion).
(cve-2021-30002).