[USN-5539-1] Linux kernel vulnerabilities


========================================================================== Ubuntu Security Notice USN-5539-1 July 28, 2022
linux-bluefield, linux-gcp-5.4, linux-gke-5.4 vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description: – linux-bluefield: Linux kernel for NVIDIA BlueField platforms – linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems – linux-gke-5.4: Linux kernel for Google Container Engine (GKE) systems
Details:
It was discovered that the implementation of the 6pack and mkiss protocols in the Linux kernel did not handle detach events properly in some situations, leading to a use-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-1195)
Duoming Zhou discovered that the AX.25 amateur radio protocol implementation in the Linux kernel did not handle detach events properly in some situations. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-1199)
Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol implementation in the Linux kernel during device detach operations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-1204)
Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol implementation in the Linux kernel, leading to use-after-free vulnerabilities. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-1205)
Yongkang Jia discovered that the KVM hypervisor implementation in the Linux kernel did not properly handle guest TLB mapping invalidation requests in some situations. An attacker in a guest VM could use this to cause a denial of service (system crash) in the host OS. (CVE-2022-1789)
It was discovered that the 8 Devices USB2CAN interface implementation in the Linux kernel did not properly handle certain error conditions, leading to a double-free. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2022-28388)
Minh Yuan discovered that the floppy driver in the Linux kernel contained a race condition 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 possibly execute arbitrary code. (CVE-2022-33981)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: linux-image-5.4.0-1042-bluefield 5.4.0-1042.47 linux-image-bluefield 5.4.0.1042.41
Ubuntu 18.04 LTS: linux-image-5.4.0-1078-gke 5.4.0-1078.84~18.04.1 linux-image-5.4.0-1084-gcp 5.4.0-1084.92~18.04.1 linux-image-gcp 5.4.0.1084.63 linux-image-gke-5.4 5.4.0.1078.84~18.04.40
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-5539-1 CVE-2022-1195, CVE-2022-1199, CVE-2022-1204, CVE-2022-1205, CVE-2022-1789, CVE-2022-28388, CVE-2022-33981
Package Information: launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1042.47 launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1084.92~18.04.1 launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1078.84~18.04.1