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UbuntuUSN-5072-1HistorySep 08, 2021 - 12:00 a.m.
Linux kernel vulnerabilities
2021-09-0800:00:00
ubuntu.com
96
Releases
- Ubuntu 20.04 LTS
Packages
- linux-azure-5.8 - Linux kernel for Microsoft Azure cloud systems
- linux-oem-5.10 - Linux kernel for OEM systems
Details
Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor
implementation for AMD processors in the Linux kernel allowed a guest VM to
disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a
guest VM could use this to read or write portions of the host’s physical
memory. (CVE-2021-3656)
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. (CVE-2021-3653)
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Ubuntu | 20.04 | noarch | linux-image-oem-20.04b | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-headers-oem-20.04 | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-headers-oem-20.04-edge | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-headers-oem-20.04b | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-image-oem-20.04 | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-image-oem-20.04-edge | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-oem-20.04 | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-oem-20.04-edge | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-oem-20.04b | < 5.10.0.1045.47 | UNKNOWN |
| Ubuntu | 20.04 | noarch | linux-tools-oem-20.04 | < 5.10.0.1045.47 | UNKNOWN |
Related
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2021-09-08 23:48:20
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(RHSA-2021:3676) Moderate: kernel security, bug fix, and enhancement update
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