Summary
Maxim Levitsky discovered that the KVM hypervisor implementation for AMD
processors in the Linux kernel did not properly prevent a guest VM from
enabling AVIC in nested guest VMs. An attacker in a guest VM could use this
to write to portions of the host's physical memory.
Fixed packages 5
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · Pro 14.04 LTS Pro:14.04:LTS | linux-aws | 4.4.0-1096.101 |
| Ubuntu · Pro 14.04 LTS Pro:14.04:LTS | linux-lts-xenial | 4.4.0-214.246~14.04.1 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux | 4.4.0-214.246 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-aws | 4.4.0-1132.146 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | linux-kvm | 4.4.0-1097.106 |
Vulnerabilities 1
-
Unscored —
A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VM…
References
-
report
https://ubuntu.com/security/CVE-2021-3653