[USN-5265-1] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-5265-1 February 03, 2022
linux, linux-aws, linux-aws-5.11, linux-aws-5.13, linux-gcp, linux-gcp-5.11, linux-hwe-5.13, linux-kvm, linux-oem-5.13, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – 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-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 systems – linux-aws-5.11: Linux kernel for Amazon Web Services (AWS) systems – linux-aws-5.13: Linux kernel for Amazon Web Services (AWS) systems – linux-gcp-5.11: Linux kernel for Google Cloud Platform (GCP) systems – linux-hwe-5.13: Linux hardware enablement (HWE) kernel – linux-oem-5.13: Linux kernel for OEM systems – linux-oracle-5.11: Linux kernel for Oracle Cloud systems
Details:
Jeremy Cline discovered a use-after-free in the nouveau graphics driver of the Linux kernel during device removal. A privileged or physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-27820)
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)
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 eBPF implementation in the Linux kernel contained a race condition around read-only maps. A privileged attacker could use this to modify read-only maps. (CVE-2021-4001)
It was discovered that the NFS server implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-4090)
Felix Wilhelm discovered that the KVM implementation in the Linux kernel did not properly handle exit events from AMD Secure Encrypted Virtualization-Encrypted State (SEV-ES) guest VMs. An attacker in a guest VM could use this to cause a denial of service (host kernel crash) or possibly execute arbitrary code in the host kernel. (CVE-2021-4093)
Lin Ma discovered that the NFC Controller Interface (NCI) implementation in the Linux kernel contained a race condition, 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-2021-4202)
It was discovered that the AMD Radeon GPU driver in the Linux kernel did not properly validate writes in the debugfs file system. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-42327)
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 21.10: linux-image-5.13.0-1011-kvm 5.13.0-1011.12 linux-image-5.13.0-1012-aws 5.13.0-1012.13 linux-image-5.13.0-1013-gcp 5.13.0-1013.16 linux-image-5.13.0-1016-oracle 5.13.0-1016.20 linux-image-5.13.0-1016-raspi 5.13.0-1016.18 linux-image-5.13.0-1016-raspi-nolpae 5.13.0-1016.18 linux-image-5.13.0-28-generic 5.13.0-28.31 linux-image-5.13.0-28-generic-64k 5.13.0-28.31 linux-image-5.13.0-28-generic-lpae 5.13.0-28.31 linux-image-5.13.0-28-lowlatency 5.13.0-28.31 linux-image-aws 5.13.0.1012.13 linux-image-gcp 5.13.0.1013.12 linux-image-generic 5.13.0.28.38 linux-image-generic-64k 5.13.0.28.38 linux-image-generic-lpae 5.13.0.28.38 linux-image-gke 5.13.0.1013.12 linux-image-kvm 5.13.0.1011.11 linux-image-lowlatency 5.13.0.28.38 linux-image-oem-20.04 5.13.0.28.38 linux-image-oracle 5.13.0.1016.16 linux-image-raspi 5.13.0.1016.21 linux-image-raspi-nolpae 5.13.0.1016.21 linux-image-virtual 5.13.0.28.38
Ubuntu 20.04 LTS: linux-image-5.11.0-1028-oracle 5.11.0-1028.31~20.04.1 linux-image-5.11.0-1029-gcp 5.11.0-1029.33~20.04.3 linux-image-5.13.0-1029-oem 5.13.0-1029.36 linux-image-5.13.0-28-generic 5.13.0-28.31~20.04.1 linux-image-5.13.0-28-generic-64k 5.13.0-28.31~20.04.1 linux-image-5.13.0-28-generic-lpae 5.13.0-28.31~20.04.1 linux-image-5.13.0-28-lowlatency 5.13.0-28.31~20.04.1 linux-image-aws 5.11.0.1028.31~20.04.26 linux-image-gcp 5.11.0.1029.33~20.04.27 linux-image-generic-64k-hwe-20.04 5.13.0.28.31~20.04.15 linux-image-generic-hwe-20.04 5.13.0.28.31~20.04.15 linux-image-generic-lpae-hwe-20.04 5.13.0.28.31~20.04.15 linux-image-lowlatency-hwe-20.04 5.13.0.28.31~20.04.15 linux-image-oem-20.04c 5.13.0.1029.31 linux-image-oracle 5.11.0.1028.31~20.04.20 linux-image-virtual-hwe-20.04 5.13.0.28.31~20.04.15
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-5265-1 CVE-2020-27820, CVE-2021-3640, CVE-2021-3752, CVE-2021-3772, CVE-2021-4001, CVE-2021-4090, CVE-2021-4093, CVE-2021-4202, CVE-2021-42327, CVE-2021-42739
Package Information: launchpad.net/ubuntu/+source/linux/5.13.0-28.31 launchpad.net/ubuntu/+source/linux-aws/5.13.0-1012.13 launchpad.net/ubuntu/+source/linux-gcp/5.13.0-1013.16 launchpad.net/ubuntu/+source/linux-kvm/5.13.0-1011.12 launchpad.net/ubuntu/+source/linux-oracle/5.13.0-1016.20 launchpad.net/ubuntu/+source/linux-raspi/5.13.0-1016.18 launchpad.net/ubuntu/+source/linux-aws-5.11/5.11.0-1028.31~20.04.1 launchpad.net/ubuntu/+source/linux-aws-5.13/5.13.0-1012.13~20.04.1 launchpad.net/ubuntu/+source/linux-gcp-5.11/5.11.0-1029.33~20.04.3 launchpad.net/ubuntu/+source/linux-hwe-5.13/5.13.0-28.31~20.04.1 launchpad.net/ubuntu/+source/linux-oem-5.13/5.13.0-1029.36 launchpad.net/ubuntu/+source/linux-oracle-5.11/5.11.0-1028.31~20.04.1