[USN-5268-1] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-5268-1 February 03, 2022
linux, linux-aws, linux-aws-hwe, linux-azure, linux-dell300x, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS – Ubuntu 16.04 ESM – Ubuntu 14.04 ESM
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-dell300x: Linux kernel for Dell 300x platforms – linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems – linux-kvm: Linux kernel for cloud environments – linux-oracle: Linux kernel for Oracle Cloud systems – linux-raspi2: Linux kernel for Raspberry Pi systems – linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors – linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems – linux-azure: Linux kernel for Microsoft Azure Cloud systems – linux-hwe: Linux hardware enablement (HWE) kernel
Keyu Man discovered that the ICMP implementation in the Linux kernel did not properly handle received ICMP error packets. A remote attacker could use this to facilitate attacks on UDP based services that depend on source port randomization. (CVE-2021-20322)
It was discovered that the Bluetooth subsystem in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3640)
Likang Luo discovered that a race condition existed in the Bluetooth subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-3752)
Luo Likang discovered that the FireDTV Firewire driver in the Linux kernel did not properly perform bounds checking in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-42739)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: linux-image-4.15.0-1034-dell300x 4.15.0-1034.39 linux-image-4.15.0-1086-oracle 4.15.0-1086.94 linux-image-4.15.0-1102-raspi2 4.15.0-1102.109 linux-image-4.15.0-1106-kvm 4.15.0-1106.108 linux-image-4.15.0-1115-gcp 4.15.0-1115.129 linux-image-4.15.0-1119-snapdragon 4.15.0-1119.128 linux-image-4.15.0-167-generic 4.15.0-167.175 linux-image-4.15.0-167-generic-lpae 4.15.0-167.175 linux-image-4.15.0-167-lowlatency 4.15.0-167.175 linux-image-aws-lts-18.04 linux-image-dell300x linux-image-gcp-lts-18.04 linux-image-generic linux-image-generic-lpae linux-image-kvm linux-image-lowlatency linux-image-oracle-lts-18.04 linux-image-raspi2 linux-image-snapdragon linux-image-virtual
Ubuntu 16.04 ESM: linux-image-4.15.0-1086-oracle 4.15.0-1086.94~16.04.1 linux-image-4.15.0-1130-azure 4.15.0-1130.143~16.04.1 linux-image-4.15.0-167-generic 4.15.0-167.175~16.04.1 linux-image-4.15.0-167-lowlatency 4.15.0-167.175~16.04.1 linux-image-aws-hwe linux-image-azure linux-image-generic-hwe-16.04 linux-image-lowlatency-hwe-16.04 linux-image-lowlatency-hwe-16.04-edge linux-image-oem linux-image-oracle linux-image-virtual-hwe-16.04
Ubuntu 14.04 ESM: linux-image-4.15.0-1130-azure 4.15.0-1130.143~14.04.1 linux-image-azure
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: ubuntu.com/security/notices/USN-5268-1 CVE-2021-20322, CVE-2021-3640, CVE-2021-3752, CVE-2021-42739
Package Information: launchpad.net/ubuntu/+source/linux/4.15.0-167.175 launchpad.net/ubuntu/+source/linux-aws/4.15.0-1119.127 launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1034.39 launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1115.129 launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1106.108 launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1086.94 launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1102.109 launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1119.128