Debian: DSA-4978-1 Critical: Linux Kernel Security Issues

CVE-2020-3702

A flaw was found in the driver for Atheros IEEE 802.11n family of
chipsets (ath9k) allowing information disclosure.

CVE-2020-16119

Hadar Manor reported a use-after-free in the DCCP protocol
implementation in the Linux kernel. A local attacker can take
advantage of this flaw to cause a denial of service or potentially
to execute arbitrary code.

CVE-2021-3653

Maxim Levitsky discovered a vulnerability in the KVM hypervisor
implementation for AMD processors in the Linux kernel: Missing
validation of the `int_ctl` VMCB field could allow a malicious L1
guest to enable AVIC support (Advanced Virtual Interrupt Controller)
for the L2 guest. The L2 guest can take advantage of this flaw to
write to a limited but still relatively large subset of the host
physical memory.

CVE-2021-3656

Maxim Levitsky and Paolo Bonzini discovered a flaw in the KVM
hypervisor implementation for AMD processors in the Linux kernel.
Missing validation of the ...