=========================================================================
\nUbuntu Security Notice USN-5514-1
\nJuly 13, 2022<\/p>\n
linux, linux-aws, linux-azure, linux-azure-5.4, linux-azure-fde,
\nlinux-gke, linux-gkeop, linux-hwe-5.4, linux-ibm, linux-kvm
\nvulnerabilities
\n=========================================================================
\nA security issue affects these releases of Ubuntu and its derivatives:<\/p>\n
– Ubuntu 20.04 LTS
\n– Ubuntu 18.04 LTS<\/p>\n
Summary:<\/p>\n
Several security issues were fixed in the Linux kernel.<\/p>\n
Software Description:
\n– linux: Linux kernel
\n– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
\n– linux-azure: Linux kernel for Microsoft Azure Cloud systems
\n– linux-azure-fde: Linux kernel for Microsoft Azure cloud systems
\n– linux-gke: Linux kernel for Google Container Engine (GKE) systems
\n– linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
\n– linux-ibm: Linux kernel for IBM cloud systems
\n– linux-kvm: Linux kernel for cloud environments
\n– linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
\n– linux-hwe-5.4: Linux hardware enablement (HWE) kernel<\/p>\n
Details:<\/p>\n
It was discovered that the implementation of the 6pack and mkiss protocols
\nin the Linux kernel did not handle detach events properly in some
\nsituations, leading to a use-after-free vulnerability. A local attacker
\ncould possibly use this to cause a denial of service (system crash).
\n(CVE-2022-1195)<\/p>\n
Duoming Zhou discovered that the AX.25 amateur radio protocol
\nimplementation in the Linux kernel did not handle detach events properly in
\nsome situations. A local attacker could possibly use this to cause a denial
\nof service (system crash) or execute arbitrary code. (CVE-2022-1199)<\/p>\n
Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol
\nimplementation in the Linux kernel during device detach operations. A local
\nattacker could possibly use this to cause a denial of service (system
\ncrash). (CVE-2022-1204)<\/p>\n
Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol
\nimplementation in the Linux kernel, leading to use-after-free
\nvulnerabilities. A local attacker could possibly use this to cause a denial
\nof service (system crash). (CVE-2022-1205)<\/p>\n
Yongkang Jia discovered that the KVM hypervisor implementation in the Linux
\nkernel did not properly handle guest TLB mapping invalidation requests in
\nsome situations. An attacker in a guest VM could use this to cause a denial
\nof service in the host OS (system crash). (CVE-2022-1789)<\/p>\n
Minh Yuan discovered that the floppy driver in the Linux kernel contained a
\nrace condition in some situations, leading to a use-after-free
\nvulnerability. A local attacker could use this to cause a denial of service
\n(system crash) or possibly execute arbitrary code. (CVE-2022-33981)<\/p>\n
Update instructions:<\/p>\n
The problem can be corrected by updating your system to the following
\npackage versions:<\/p>\n
Ubuntu 20.04 LTS:
\nlinux-image-5.4.0-1029-ibm 5.4.0-1029.33
\nlinux-image-5.4.0-1049-gkeop 5.4.0-1049.52
\nlinux-image-5.4.0-1071-kvm 5.4.0-1071.76
\nlinux-image-5.4.0-1078-gke 5.4.0-1078.84
\nlinux-image-5.4.0-1081-aws 5.4.0-1081.88
\nlinux-image-5.4.0-1086-azure 5.4.0-1086.91
\nlinux-image-5.4.0-1086-azure-fde 5.4.0-1086.91+cvm1.1
\nlinux-image-5.4.0-122-generic 5.4.0-122.138
\nlinux-image-5.4.0-122-generic-lpae 5.4.0-122.138
\nlinux-image-5.4.0-122-lowlatency 5.4.0-122.138
\nlinux-image-aws-lts-20.04 5.4.0.1081.81
\nlinux-image-azure-fde 5.4.0.1086.91+cvm1.27
\nlinux-image-azure-lts-20.04 5.4.0.1086.83
\nlinux-image-generic 5.4.0.122.123
\nlinux-image-generic-lpae 5.4.0.122.123
\nlinux-image-gke 5.4.0.1078.86
\nlinux-image-gke-5.4 5.4.0.1078.86
\nlinux-image-gkeop 5.4.0.1049.50
\nlinux-image-gkeop-5.4 5.4.0.1049.50
\nlinux-image-ibm 5.4.0.1029.58
\nlinux-image-ibm-lts-20.04 5.4.0.1029.58
\nlinux-image-kvm 5.4.0.1071.68
\nlinux-image-lowlatency 5.4.0.122.123
\nlinux-image-oem 5.4.0.122.123
\nlinux-image-oem-osp1 5.4.0.122.123
\nlinux-image-virtual 5.4.0.122.123<\/p>\n
Ubuntu 18.04 LTS:
\nlinux-image-5.4.0-1086-azure 5.4.0-1086.91~18.04.1
\nlinux-image-5.4.0-122-generic 5.4.0-122.138~18.04.1
\nlinux-image-5.4.0-122-generic-lpae 5.4.0-122.138~18.04.1
\nlinux-image-5.4.0-122-lowlatency 5.4.0-122.138~18.04.1
\nlinux-image-azure 5.4.0.1086.63
\nlinux-image-generic-hwe-18.04 5.4.0.122.138~18.04.102
\nlinux-image-generic-lpae-hwe-18.04 5.4.0.122.138~18.04.102
\nlinux-image-lowlatency-hwe-18.04 5.4.0.122.138~18.04.102
\nlinux-image-oem 5.4.0.122.138~18.04.102
\nlinux-image-oem-osp1 5.4.0.122.138~18.04.102
\nlinux-image-snapdragon-hwe-18.04 5.4.0.122.138~18.04.102
\nlinux-image-virtual-hwe-18.04 5.4.0.122.138~18.04.102<\/p>\n
After a standard system update you need to reboot your computer to make
\nall the necessary changes.<\/p>\n
ATTENTION: Due to an unavoidable ABI change the kernel updates have
\nbeen given a new version number, which requires you to recompile and
\nreinstall all third party kernel modules you might have installed.
\nUnless you manually uninstalled the standard kernel metapackages
\n(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
\nlinux-powerpc), a standard system upgrade will automatically perform
\nthis as well.<\/p>\n
References:
\nhttps:\/\/ubuntu.com\/security\/notices\/USN-5514-1
\nCVE-2022-1195, CVE-2022-1199, CVE-2022-1204, CVE-2022-1205,
\nCVE-2022-1789, CVE-2022-33981<\/p>\n
Package Information:
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux\/5.4.0-122.138
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-aws\/5.4.0-1081.88
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-azure\/5.4.0-1086.91
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-azure-fde\/5.4.0-1086.91+cvm1.1
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-gke\/5.4.0-1078.84
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-gkeop\/5.4.0-1049.52
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-ibm\/5.4.0-1029.33
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-kvm\/5.4.0-1071.76
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-azure-5.4\/5.4.0-1086.91~18.04.1
\nhttps:\/\/launchpad.net\/ubuntu\/+source\/linux-hwe-5.4\/5.4.0-122.138~18.04.1<\/p>\n","protected":false},"excerpt":{"rendered":"
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