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AUSCERT External Security Bulletin Redistribution
ESB-2022.0127
USN-5219-1: Linux kernel vulnerability
12 January 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Linux Kernel
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-4204
Reference: ESB-2022.0126
Original Bulletin:
https://ubuntu.com/security/notices/USN-5219-1
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USN-5219-1: Linux kernel vulnerability
11 January 2022
The system could be made to crash or run programs as an administrator.
Releases
o Ubuntu 21.10
o Ubuntu 21.04
o Ubuntu 20.04 LTS
Packages
o linux - Linux kernel
o linux-aws - Linux kernel for Amazon Web Services (AWS) systems
o linux-aws-5.11 - Linux kernel for Amazon Web Services (AWS) systems
o linux-azure - Linux kernel for Microsoft Azure Cloud systems
o linux-azure-5.11 - Linux kernel for Microsoft Azure cloud systems
o linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
o linux-gcp-5.11 - Linux kernel for Google Cloud Platform (GCP) systems
o linux-hwe-5.11 - Linux hardware enablement (HWE) kernel
o linux-kvm - Linux kernel for cloud environments
o linux-oem-5.10 - Linux kernel for OEM systems
o linux-oracle - Linux kernel for Oracle Cloud systems
o linux-oracle-5.11 - Linux kernel for Oracle Cloud systems
o linux-raspi - Linux kernel for Raspberry Pi systems
Details
It was discovered that the eBPF implementation in the Linux kernel did
not properly validate the memory size of certain ring buffer operation
arguments. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.10
o linux-image-5.13.0-1008-kvm - 5.13.0-1008.8
o linux-image-virtual - 5.13.0.25.36
o linux-image-5.13.0-25-generic - 5.13.0-25.26
o linux-image-generic-64k - 5.13.0.25.36
o linux-image-generic - 5.13.0.25.36
o linux-image-aws - 5.13.0.1009.11
o linux-image-5.13.0-1010-gcp - 5.13.0-1010.12
o linux-image-5.13.0-25-generic-64k - 5.13.0-25.26
o linux-image-5.13.0-25-generic-lpae - 5.13.0-25.26
o linux-image-5.13.0-1013-oracle - 5.13.0-1013.16
o linux-image-5.13.0-1013-raspi-nolpae - 5.13.0-1013.15
o linux-image-5.13.0-1010-azure - 5.13.0-1010.11
o linux-image-raspi-nolpae - 5.13.0.1013.19
o linux-image-oem-20.04 - 5.13.0.25.36
o linux-image-gke - 5.13.0.1010.10
o linux-image-5.13.0-1013-raspi - 5.13.0-1013.15
o linux-image-gcp - 5.13.0.1010.10
o linux-image-5.13.0-25-lowlatency - 5.13.0-25.26
o linux-image-oracle - 5.13.0.1013.14
o linux-image-5.13.0-1009-aws - 5.13.0-1009.10
o linux-image-azure - 5.13.0.1010.11
o linux-image-raspi - 5.13.0.1013.19
o linux-image-kvm - 5.13.0.1008.8
o linux-image-generic-lpae - 5.13.0.25.36
o linux-image-lowlatency - 5.13.0.25.36
Ubuntu 21.04
o linux-image-virtual - 5.11.0.46.46
o linux-image-5.11.0-46-generic-64k - 5.11.0-46.51
o linux-image-generic-64k - 5.11.0.46.46
o linux-image-generic - 5.11.0.46.46
o linux-image-aws - 5.11.0.1025.25
o linux-image-5.11.0-1025-raspi-nolpae - 5.11.0-1025.27
o linux-image-5.11.0-1025-azure - 5.11.0-1025.27
o linux-image-5.11.0-1025-raspi - 5.11.0-1025.27
o linux-image-5.11.0-46-generic - 5.11.0-46.51
o linux-image-5.11.0-1022-kvm - 5.11.0-1022.24
o linux-image-5.11.0-1025-oracle - 5.11.0-1025.27
o linux-image-azure - 5.11.0.1025.25
o linux-image-raspi-nolpae - 5.11.0.1025.23
o linux-image-oem-20.04 - 5.11.0.46.46
o linux-image-gke - 5.11.0.1026.25
o linux-image-5.11.0-1026-gcp - 5.11.0-1026.29
o linux-image-5.11.0-46-lowlatency - 5.11.0-46.51
o linux-image-gcp - 5.11.0.1026.25
o linux-image-5.11.0-1025-aws - 5.11.0-1025.27
o linux-image-oracle - 5.11.0.1025.25
o linux-image-5.11.0-46-generic-lpae - 5.11.0-46.51
o linux-image-raspi - 5.11.0.1025.23
o linux-image-kvm - 5.11.0.1022.23
o linux-image-generic-lpae - 5.11.0.46.46
o linux-image-lowlatency - 5.11.0.46.46
Ubuntu 20.04
o linux-image-oem-20.04b - 5.10.0.1055.56
o linux-image-5.11.0-46-generic-lpae - 5.11.0-46.51~20.04.1
o linux-image-aws - 5.11.0.1025.27~20.04.24
o linux-image-lowlatency-hwe-20.04 - 5.11.0.46.51~20.04.23
o linux-image-5.11.0-1025-azure - 5.11.0-1025.27~20.04.1
o linux-image-5.10.0-1055-oem - 5.10.0-1055.58
o linux-image-5.11.0-1026-gcp - 5.11.0-1026.29~20.04.1
o linux-image-5.11.0-46-generic - 5.11.0-46.51~20.04.1
o linux-image-5.11.0-1025-oracle - 5.11.0-1025.27~20.04.1
o linux-image-generic-hwe-20.04 - 5.11.0.46.51~20.04.23
o linux-image-oem-20.04 - 5.10.0.1055.56
o linux-image-5.11.0-46-lowlatency - 5.11.0-46.51~20.04.1
o linux-image-gcp - 5.11.0.1026.29~20.04.25
o linux-image-5.11.0-1025-aws - 5.11.0-1025.27~20.04.1
o linux-image-oracle - 5.11.0.1025.27~20.04.18
o linux-image-5.11.0-46-generic-64k - 5.11.0-46.51~20.04.1
o linux-image-generic-lpae-hwe-20.04 - 5.11.0.46.51~20.04.23
o linux-image-azure - 5.11.0.1025.27~20.04.24
o linux-image-generic-64k-hwe-20.04 - 5.11.0.46.51~20.04.23
o linux-image-virtual-hwe-20.04 - 5.11.0.46.51~20.04.23
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
o CVE-2021-4204
o https://launchpad.net/bugs/1956585
Related notices
o USN-5217-1 : linux-tools-oem-20.04d, linux-oem-5.14-tools-host,
linux-modules-5.14.0-1018-oem, linux-oem-5.14-headers-5.14.0-1018,
linux-oem-5.14, linux-buildinfo-5.14.0-1018-oem,
linux-headers-5.14.0-1018-oem, linux-oem-5.14-tools-5.14.0-1018,
linux-image-5.14.0-1018-oem, linux-tools-5.14.0-1018-oem,
linux-headers-oem-20.04d, linux-oem-20.04d,
linux-image-unsigned-5.14.0-1018-oem, linux-image-oem-20.04d
o USN-5218-1 : linux-tools-oem-20.04c, linux-image-oem-20.04c,
linux-headers-5.13.0-1026-oem, linux-image-unsigned-5.13.0-1026-oem,
linux-oem-5.13, linux-headers-oem-20.04c,
linux-oem-5.13-headers-5.13.0-1026, linux-oem-5.13-tools-5.13.0-1026,
linux-tools-5.13.0-1026-oem, linux-image-5.13.0-1026-oem,
linux-modules-5.13.0-1026-oem, linux-oem-5.13-tools-host, linux-oem-20.04c,
linux-buildinfo-5.13.0-1026-oem
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