[USN-5385-1] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-5385-1 April 21, 2022
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-dell300x, linux-gcp, inux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, 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-azure-4.15: Linux kernel for Microsoft Azure Cloud 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-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
Brendan Dolan-Gavitt discovered that the aQuantia AQtion Ethernet device driver in the Linux kernel did not properly validate meta-data coming from the device. A local attacker who can control an emulated device can use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-43975)
It was discovered that the UDF file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious UDF image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2022-0617)
Lyu Tao discovered that the NFS implementation in the Linux kernel did not properly handle requests to open a directory on a regular file. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2022-24448)
It was discovered that the YAM AX.25 device driver in the Linux kernel did not properly deallocate memory in some error conditions. A local privileged attacker could use this to cause a denial of service (kernel memory exhaustion). (CVE-2022-24959)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04 LTS: linux-image-4.15.0-1041-dell300x 4.15.0-1041.46 linux-image-4.15.0-1092-oracle 4.15.0-1092.101 linux-image-4.15.0-1113-kvm 4.15.0-1113.116 linux-image-4.15.0-1121-gcp 4.15.0-1121.135 linux-image-4.15.0-1126-snapdragon 4.15.0-1126.135 linux-image-4.15.0-1127-aws 4.15.0-1127.136 linux-image-4.15.0-1137-azure 4.15.0-1137.150 linux-image-4.15.0-176-generic 4.15.0-176.185 linux-image-4.15.0-176-generic-lpae 4.15.0-176.185 linux-image-4.15.0-176-lowlatency 4.15.0-176.185 linux-image-aws-lts-18.04 linux-image-azure-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-snapdragon linux-image-virtual
Ubuntu 16.04 ESM: linux-image-4.15.0-1092-oracle 4.15.0-1092.101~16.04.1 linux-image-4.15.0-1121-gcp 4.15.0-1121.135~16.04.1 linux-image-4.15.0-1127-aws-hwe 4.15.0-1127.136~16.04.1 linux-image-4.15.0-1137-azure 4.15.0-1137.150~16.04.1 linux-image-4.15.0-176-generic 4.15.0-176.185~16.04.1 linux-image-4.15.0-176-lowlatency 4.15.0-176.185~16.04.1 linux-image-aws-hwe linux-image-azure linux-image-gcp linux-image-generic-hwe-16.04 linux-image-gke linux-image-lowlatency-hwe-16.04 linux-image-oem linux-image-oracle linux-image-virtual-hwe-16.04
Ubuntu 14.04 ESM: linux-image-4.15.0-1137-azure 4.15.0-1137.150~14.04.1 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-5385-1 CVE-2021-43975, CVE-2022-0617, CVE-2022-24448, CVE-2022-24959
Package Information: launchpad.net/ubuntu/+source/linux/4.15.0-176.185 launchpad.net/ubuntu/+source/linux-aws/4.15.0-1127.136 launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1137.150 launchpad.net/ubuntu/+source/linux-dell300x/4.15.0-1041.46 launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1121.135 launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1113.116 launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1092.101 launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1126.135