[USN-5466-1] Linux kernel vulnerabilities


========================================================================== Ubuntu Security Notice USN-5466-1 June 08, 2022
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, 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
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-4.15: Linux kernel for Microsoft Azure Cloud 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-gcp: Linux kernel for Google Cloud Platform (GCP) systems – linux-hwe: Linux hardware enablement (HWE) kernel
Details:
It was discovered that the Linux kernel did not properly restrict access to the kernel debugger when booted in secure boot environments. A privileged attacker could use this to bypass UEFI Secure Boot restrictions. (CVE-2022-21499)
Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the removal of stateful expressions in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-1966)
It was discovered that the SCTP protocol implementation in the Linux kernel did not properly verify VTAGs in some situations. A remote attacker could possibly use this to cause a denial of service (connection disassociation). (CVE-2021-3772)
It was discovered that the btrfs file system implementation in the Linux kernel did not properly handle locking in certain error conditions. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2021-4149)
David Bouman discovered that the netfilter subsystem in the Linux kernel did not initialize memory in some situations. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2022-1016)
It was discovered that the virtual graphics memory manager implementation in the Linux kernel was subject to a race condition, potentially leading to an information leak. (CVE-2022-1419)
赵子轩 discovered that the 802.2 LLC type 2 driver in the Linux kernel did not properly perform reference counting in some error conditions. A local attacker could use this to cause a denial of service. (CVE-2022-28356)
It was discovered that the EMS CAN/USB interface implementation in the Linux kernel contained a double-free vulnerability when handling certain error conditions. A local attacker could use this to cause a denial of service (memory exhaustion). (CVE-2022-28390)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: linux-image-4.15.0-1098-oracle 4.15.0-1098.108 linux-image-4.15.0-1114-raspi2 4.15.0-1114.122 linux-image-4.15.0-1119-kvm 4.15.0-1119.123 linux-image-4.15.0-1132-snapdragon 4.15.0-1132.142 linux-image-4.15.0-1133-aws 4.15.0-1133.143 linux-image-4.15.0-1142-azure 4.15.0-1142.156 linux-image-4.15.0-184-generic 4.15.0-184.194 linux-image-4.15.0-184-generic-lpae 4.15.0-184.194 linux-image-4.15.0-184-lowlatency 4.15.0-184.194 linux-image-aws-lts-18.04 4.15.0.1133.135 linux-image-azure-lts-18.04 4.15.0.1142.114 linux-image-generic 4.15.0.184.172 linux-image-generic-lpae 4.15.0.184.172 linux-image-kvm 4.15.0.1119.114 linux-image-lowlatency 4.15.0.184.172 linux-image-oracle-lts-18.04 4.15.0.1098.107 linux-image-raspi2 4.15.0.1114.111 linux-image-snapdragon 4.15.0.1132.133 linux-image-virtual 4.15.0.184.172
Ubuntu 16.04 ESM: linux-image-4.15.0-1098-oracle 4.15.0-1098.108~16.04.1 linux-image-4.15.0-1127-gcp 4.15.0-1127.142~16.04.1 linux-image-4.15.0-1133-aws-hwe 4.15.0-1133.143~16.04.1 linux-image-4.15.0-1142-azure 4.15.0-1142.156~16.04.1 linux-image-4.15.0-184-generic 4.15.0-184.194~16.04.1 linux-image-4.15.0-184-lowlatency 4.15.0-184.194~16.04.1 linux-image-aws-hwe 4.15.0.1133.122 linux-image-azure 4.15.0.1142.131 linux-image-gcp 4.15.0.1127.126 linux-image-generic-hwe-16.04 4.15.0.184.173 linux-image-gke 4.15.0.1127.126 linux-image-lowlatency-hwe-16.04 4.15.0.184.173 linux-image-oem 4.15.0.184.173 linux-image-oracle 4.15.0.1098.85 linux-image-virtual-hwe-16.04 4.15.0.184.173
Ubuntu 14.04 ESM: linux-image-4.15.0-1142-azure 4.15.0-1142.156~14.04.1 linux-image-azure 4.15.0.1142.113
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-5466-1 CVE-2021-3772, CVE-2021-4149, CVE-2022-1016, CVE-2022-1419, CVE-2022-1966, CVE-2022-21499, CVE-2022-28356, CVE-2022-28390
Package Information: launchpad.net/ubuntu/+source/linux/4.15.0-184.194 launchpad.net/ubuntu/+source/linux-aws/4.15.0-1133.143 launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1142.156 launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1119.123 launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1098.108 launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1114.122 launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1132.142