Important: kernel

Issue Overview:

A flaw was found in the way KVM hypervisor handled instruction emulation for the L2 guest when nested(=1) virtualization is enabled. In the instruction emulation, the L2 guest could trick the L0 hypervisor into accessing sensitive bits of the L1 hypervisor. An L2 guest could use this flaw to potentially access information of the L1 hypervisor. (CVE-2020-2732)

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the n_tty_receive_buf_common function in drivers/tty/n_tty. (CVE-2020-8648)

Affected Packages:

kernel

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update kernel to update your system.

New Packages:

aarch64:  
    kernel-4.14.173-137.228.amzn2.aarch64  
    kernel-headers-4.14.173-137.228.amzn2.aarch64  
    kernel-debuginfo-common-aarch64-4.14.173-137.228.amzn2.aarch64  
    perf-4.14.173-137.228.amzn2.aarch64  
    perf-debuginfo-4.14.173-137.228.amzn2.aarch64  
    python-perf-4.14.173-137.228.amzn2.aarch64  
    python-perf-debuginfo-4.14.173-137.228.amzn2.aarch64  
    kernel-tools-4.14.173-137.228.amzn2.aarch64  
    kernel-tools-devel-4.14.173-137.228.amzn2.aarch64  
    kernel-tools-debuginfo-4.14.173-137.228.amzn2.aarch64  
    kernel-devel-4.14.173-137.228.amzn2.aarch64  
    kernel-debuginfo-4.14.173-137.228.amzn2.aarch64  
  
i686:  
    kernel-headers-4.14.173-137.228.amzn2.i686  
  
src:  
    kernel-4.14.173-137.228.amzn2.src  
  
x86_64:  
    kernel-4.14.173-137.228.amzn2.x86_64  
    kernel-headers-4.14.173-137.228.amzn2.x86_64  
    kernel-debuginfo-common-x86_64-4.14.173-137.228.amzn2.x86_64  
    perf-4.14.173-137.228.amzn2.x86_64  
    perf-debuginfo-4.14.173-137.228.amzn2.x86_64  
    python-perf-4.14.173-137.228.amzn2.x86_64  
    python-perf-debuginfo-4.14.173-137.228.amzn2.x86_64  
    kernel-tools-4.14.173-137.228.amzn2.x86_64  
    kernel-tools-devel-4.14.173-137.228.amzn2.x86_64  
    kernel-tools-debuginfo-4.14.173-137.228.amzn2.x86_64  
    kernel-devel-4.14.173-137.228.amzn2.x86_64  
    kernel-debuginfo-4.14.173-137.228.amzn2.x86_64  
    kernel-livepatch-4.14.173-137.228-1.0-0.amzn2.x86_64  

Additional References

Red Hat: CVE-2020-10942, CVE-2020-2732, CVE-2020-8648

Mitre: CVE-2020-10942, CVE-2020-2732, CVE-2020-8648