Ubuntu 5016-1: Linux kernel vulnerabilities

Ubuntu 5016-1: Linux kernel vulnerabilities

==========================================================================
Ubuntu Security Notice USN-5016-1
July 20, 2021 linux, linux-aws, linux-aws-5.8, linux-azure, linux-azure-5.8, linux-gcp,
linux-gcp-5.8, linux-hwe-5.8, linux-kvm, linux-oracle, linux-oracle-5.8,
linux-raspi vulnerabilities
========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10
- Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description:
- linux: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi (V8) systems
- linux-aws-5.8: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.8: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-5.8: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.8: Linux hardware enablement (HWE) kernel
- linux-oracle-5.8: Linux kernel for Oracle Cloud systems Details: It was discovered that the virtual file system implementation in the Linux
kernel contained an unsigned to signed integer conversion error. A local
attacker could use this to cause a denial of service (system crash) or
execute arbitrary code. (CVE-2021-33909) Or Cohen and Nadav Markus discovered a use-after-free vulnerability in the
nfc implementation in the Linux kernel. A privileged local attacker could
use this issue to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2021-23134) It was discovered that a race condition in the kernel Bluetooth subsystem
could lead to use-after-free of slab objects. An attacker could use this
issue to possibly execute arbitrary code. (CVE-2021-32399) It was discovered that a use-after-free existed in the Bluetooth HCI driver
of the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2021-33034) It was discovered that an out-of-bounds (OOB) memory access flaw existed in
the f2fs module of the Linux kernel. A local attacker could use this issue
to cause a denial of service (system crash). (CVE-2021-3506) Update instructions: The problem can be corrected by updating your system to the following
package versions: Ubuntu 20.10: linux-image-5.8.0-1032-raspi 5.8.0-1032.35 linux-image-5.8.0-1032-raspi-nolpae  5.8.0-1032.35 linux-image-5.8.0-1033-kvm 5.8.0-1033.36 linux-image-5.8.0-1037-oracle 5.8.0-1037.38 linux-image-5.8.0-1038-gcp 5.8.0-1038.40 linux-image-5.8.0-1039-azure 5.8.0-1039.42 linux-image-5.8.0-1041-aws 5.8.0-1041.43 linux-image-5.8.0-63-generic 5.8.0-63.71 linux-image-5.8.0-63-generic-64k  5.8.0-63.71 linux-image-5.8.0-63-generic-lpae  5.8.0-63.71 linux-image-5.8.0-63-lowlatency  5.8.0-63.71 linux-image-aws 5.8.0.1041.43 linux-image-azure 5.8.0.1039.40 linux-image-gcp 5.8.0.1038.38 linux-image-generic 5.8.0.63.69 linux-image-generic-64k 5.8.0.63.69 linux-image-generic-lpae 5.8.0.63.69 linux-image-gke 5.8.0.1038.38 linux-image-kvm 5.8.0.1033.36 linux-image-lowlatency 5.8.0.63.69 linux-image-oem-20.04 5.8.0.63.69 linux-image-oracle 5.8.0.1037.36 linux-image-raspi 5.8.0.1032.34 linux-image-raspi-nolpae 5.8.0.1032.34 linux-image-virtual 5.8.0.63.69 Ubuntu 20.04 LTS: linux-image-5.8.0-1037-oracle 5.8.0-1037.38~20.04.1 linux-image-5.8.0-1038-gcp 5.8.0-1038.40~20.04.1 linux-image-5.8.0-1039-azure 5.8.0-1039.42~20.04.1 linux-image-5.8.0-1041-aws 5.8.0-1041.43~20.04.1 linux-image-5.8.0-63-generic 5.8.0-63.71~20.04.1 linux-image-5.8.0-63-generic-64k  5.8.0-63.71~20.04.1 linux-image-5.8.0-63-generic-lpae  5.8.0-63.71~20.04.1 linux-image-5.8.0-63-lowlatency  5.8.0-63.71~20.04.1 linux-image-aws 5.8.0.1041.43~20.04.13 linux-image-azure 5.8.0.1039.42~20.04.11 linux-image-gcp 5.8.0.1038.40~20.04.13 linux-image-generic-64k-hwe-20.04  5.8.0.63.71~20.04.45 linux-image-generic-hwe-20.04 5.8.0.63.71~20.04.45 linux-image-generic-lpae-hwe-20.04  5.8.0.63.71~20.04.45 linux-image-lowlatency-hwe-20.04  5.8.0.63.71~20.04.45 linux-image-oracle 5.8.0.1037.38~20.04.13 linux-image-virtual-hwe-20.04 5.8.0.63.71~20.04.45 After a standard system update you need to reboot your computer to make
all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well. References: https://ubuntu.com/security/notices/USN-5016-1 CVE-2021-23134, CVE-2021-32399, CVE-2021-33034, CVE-2021-33909, CVE-2021-3506 Package Information: https://launchpad.net/ubuntu/+source/linux/5.8.0-63.71 https://launchpad.net/ubuntu/+source/linux-aws/5.8.0-1041.43 https://launchpad.net/ubuntu/+source/linux-azure/5.8.0-1039.42 https://launchpad.net/ubuntu/+source/linux-gcp/5.8.0-1038.40 https://launchpad.net/ubuntu/+source/linux-kvm/5.8.0-1033.36 https://launchpad.net/ubuntu/+source/linux-oracle/5.8.0-1037.38 https://launchpad.net/ubuntu/+source/linux-raspi/5.8.0-1032.35 https://launchpad.net/ubuntu/+source/linux-aws-5.8/5.8.0-1041.43~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-5.8/5.8.0-1039.42~20.04.1 https://launchpad.net/ubuntu/+source/linux-gcp-5.8/5.8.0-1038.40~20.04.1 https://launchpad.net/ubuntu/+source/linux-hwe-5.8/5.8.0-63.71~20.04.1 https://launchpad.net/ubuntu/+source/linux-oracle-5.8/5.8.0-1037.38~20.04.1

https://linuxsecurity.com/advisories/ubuntu/ubuntu-5016-1-linux-kernel-vulnerabilities-18-50-57