[USN-5208-1] Linux kernel vulnerabilities

========================================================================== Ubuntu Security Notice USN-5208-1 January 06, 2022
linux, linux-aws, linux-aws-5.11, linux-azure, linux-azure-5.11, linux-gcp, linux-gcp-5.11, linux-hwe-5.11, linux-kvm, linux-oracle, linux-oracle-5.11, linux-raspi vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 21.04 – 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-azure: Linux kernel for Microsoft Azure Cloud 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-azure-5.11: Linux kernel for Microsoft Azure cloud systems – linux-gcp-5.11: Linux kernel for Google Cloud Platform (GCP) systems – linux-hwe-5.11: Linux hardware enablement (HWE) kernel – linux-oracle-5.11: Linux kernel for Oracle Cloud systems
Details:
Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages. (CVE-2021-4002)
It was discovered that a race condition existed in the overlay file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2021-20321)
It was discovered that the NFC subsystem in the Linux kernel contained a use-after-free vulnerability in its NFC Controller Interface (NCI) implementation. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2021-3760)
It was discovered that an integer overflow could be triggered in the eBPF implementation in the Linux kernel when preallocating objects for stack maps. A privileged local attacker could use this to cause a denial of service or possibly execute arbitrary code. (CVE-2021-41864)
It was discovered that the KVM implementation for POWER8 processors in the Linux kernel did not properly keep track if a wakeup event could be resolved by a guest. An attacker in a guest VM could possibly use this to cause a denial of service (host OS crash). (CVE-2021-43056)
It was discovered that the TIPC Protocol implementation in the Linux kernel did not properly validate MSG_CRYPTO messages in some situations. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2021-43267)
It was discovered that the ISDN CAPI implementation in the Linux kernel contained a race condition in certain situations that could trigger an array out-of-bounds bug. A privileged local attacker could possibly use this to cause a denial of service or execute arbitrary code. (CVE-2021-43389)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: linux-image-5.13.0-1007-kvm 5.13.0-1007.7 linux-image-5.13.0-1008-aws 5.13.0-1008.9 linux-image-5.13.0-1008-gcp 5.13.0-1008.9 linux-image-5.13.0-1009-azure 5.13.0-1009.10 linux-image-5.13.0-1011-oracle 5.13.0-1011.13 linux-image-5.13.0-1012-raspi 5.13.0-1012.14 linux-image-5.13.0-1012-raspi-nolpae 5.13.0-1012.14 linux-image-5.13.0-23-generic 5.13.0-23.23 linux-image-5.13.0-23-generic-64k 5.13.0-23.23 linux-image-5.13.0-23-generic-lpae 5.13.0-23.23 linux-image-5.13.0-23-lowlatency 5.13.0-23.23 linux-image-aws 5.13.0.1008.10 linux-image-azure 5.13.0.1009.10 linux-image-gcp 5.13.0.1008.9 linux-image-generic 5.13.0.23.34 linux-image-generic-64k 5.13.0.23.34 linux-image-generic-lpae 5.13.0.23.34 linux-image-gke 5.13.0.1008.9 linux-image-kvm 5.13.0.1007.7 linux-image-lowlatency 5.13.0.23.34 linux-image-oem-20.04 5.13.0.23.34 linux-image-oracle 5.13.0.1011.13 linux-image-raspi 5.13.0.1012.18 linux-image-raspi-nolpae 5.13.0.1012.18 linux-image-virtual 5.13.0.23.34
Ubuntu 21.04: linux-image-5.11.0-1021-kvm 5.11.0-1021.23 linux-image-5.11.0-1023-aws 5.11.0-1023.24 linux-image-5.11.0-1023-azure 5.11.0-1023.24 linux-image-5.11.0-1023-oracle 5.11.0-1023.24 linux-image-5.11.0-1024-gcp 5.11.0-1024.26 linux-image-5.11.0-1024-raspi 5.11.0-1024.26 linux-image-5.11.0-1024-raspi-nolpae 5.11.0-1024.26 linux-image-5.11.0-44-generic 5.11.0-44.48 linux-image-5.11.0-44-generic-64k 5.11.0-44.48 linux-image-5.11.0-44-generic-lpae 5.11.0-44.48 linux-image-5.11.0-44-lowlatency 5.11.0-44.48 linux-image-aws 5.11.0.1023.24 linux-image-azure 5.11.0.1023.24 linux-image-gcp 5.11.0.1024.24 linux-image-generic 5.11.0.44.44 linux-image-generic-64k 5.11.0.44.44 linux-image-generic-lpae 5.11.0.44.44 linux-image-gke 5.11.0.1024.24 linux-image-kvm 5.11.0.1021.22 linux-image-lowlatency 5.11.0.44.44 linux-image-oem-20.04 5.11.0.44.44 linux-image-oracle 5.11.0.1023.24 linux-image-raspi 5.11.0.1024.22 linux-image-raspi-nolpae 5.11.0.1024.22 linux-image-virtual 5.11.0.44.44
Ubuntu 20.04 LTS: linux-image-5.11.0-1023-aws 5.11.0-1023.24~20.04.1 linux-image-5.11.0-1023-azure 5.11.0-1023.24~20.04.1 linux-image-5.11.0-1023-oracle 5.11.0-1023.24~20.04.1 linux-image-5.11.0-1024-gcp 5.11.0-1024.26~20.04.1 linux-image-5.11.0-44-generic 5.11.0-44.48~20.04.2 linux-image-5.11.0-44-generic-64k 5.11.0-44.48~20.04.2 linux-image-5.11.0-44-generic-lpae 5.11.0-44.48~20.04.2 linux-image-5.11.0-44-lowlatency 5.11.0-44.48~20.04.2 linux-image-aws 5.11.0.1023.24~20.04.23 linux-image-azure 5.11.0.1023.24~20.04.23 linux-image-gcp 5.11.0.1024.26~20.04.24 linux-image-generic-64k-hwe-20.04 5.11.0.44.48~20.04.22 linux-image-generic-hwe-20.04 5.11.0.44.48~20.04.22 linux-image-generic-lpae-hwe-20.04 5.11.0.44.48~20.04.22 linux-image-lowlatency-hwe-20.04 5.11.0.44.48~20.04.22 linux-image-oracle 5.11.0.1023.24~20.04.16 linux-image-virtual-hwe-20.04 5.11.0.44.48~20.04.22
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-5208-1 CVE-2021-20321, CVE-2021-3760, CVE-2021-4002, CVE-2021-41864, CVE-2021-43056, CVE-2021-43267, CVE-2021-43389
Package Information: launchpad.net/ubuntu/+source/linux/5.13.0-23.23 launchpad.net/ubuntu/+source/linux-aws/5.13.0-1008.9 launchpad.net/ubuntu/+source/linux-azure/5.13.0-1009.10 launchpad.net/ubuntu/+source/linux-gcp/5.13.0-1008.9 launchpad.net/ubuntu/+source/linux-kvm/5.13.0-1007.7 launchpad.net/ubuntu/+source/linux-oracle/5.13.0-1011.13 launchpad.net/ubuntu/+source/linux-raspi/5.13.0-1012.14 launchpad.net/ubuntu/+source/linux/5.11.0-44.48 launchpad.net/ubuntu/+source/linux-aws/5.11.0-1023.24 launchpad.net/ubuntu/+source/linux-azure/5.11.0-1023.24 launchpad.net/ubuntu/+source/linux-gcp/5.11.0-1024.26 launchpad.net/ubuntu/+source/linux-kvm/5.11.0-1021.23 launchpad.net/ubuntu/+source/linux-oracle/5.11.0-1023.24 launchpad.net/ubuntu/+source/linux-raspi/5.11.0-1024.26 launchpad.net/ubuntu/+source/linux-aws-5.11/5.11.0-1023.24~20.04.1 launchpad.net/ubuntu/+source/linux-azure-5.11/5.11.0-1023.24~20.04.1 launchpad.net/ubuntu/+source/linux-gcp-5.11/5.11.0-1024.26~20.04.1 launchpad.net/ubuntu/+source/linux-hwe-5.11/5.11.0-44.48~20.04.2 launchpad.net/ubuntu/+source/linux-oracle-5.11/5.11.0-1023.24~20.04.1