USN-5267-2: Linux kernel regression
=========================================================================
Ubuntu Security Notice USN-5267-2
February 08, 2022
linux, linux-aws, linux-aws-5.4, linux-gcp, linux-gcp-5.4, linux-hwe-5.4,
linux-ibm, linux-kvm, linux-oracle, linux-oracle-5.4 regression
=========================================================================
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: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
Details:
USN-5267-1 fixed vulnerabilities in the Linux kernel. Unfortunately,
that update introduced a regression that caused the kernel to freeze
when accessing CIFS shares in some situations. This update fixes
the problem.
We apologize for the inconvenience.
Original advisory details:
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)
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 20.04 LTS:
linux-image-5.4.0-1014-ibm 5.4.0-1014.15
linux-image-5.4.0-1055-kvm 5.4.0-1055.57
linux-image-5.4.0-1063-oracle 5.4.0-1063.67
linux-image-5.4.0-1064-gcp 5.4.0-1064.68
linux-image-5.4.0-1065-aws 5.4.0-1065.68
linux-image-5.4.0-99-generic 5.4.0-99.112
linux-image-5.4.0-99-generic-lpae 5.4.0-99.112
linux-image-5.4.0-99-lowlatency 5.4.0-99.112
linux-image-aws-lts-20.04 5.4.0.1065.67
linux-image-gcp-lts-20.04 5.4.0.1064.74
linux-image-generic 5.4.0.99.103
linux-image-generic-lpae 5.4.0.99.103
linux-image-ibm 5.4.0.1014.15
linux-image-ibm-lts-20.04 5.4.0.1014.15
linux-image-kvm 5.4.0.1055.54
linux-image-lowlatency 5.4.0.99.103
linux-image-oem 5.4.0.99.103
linux-image-oem-osp1 5.4.0.99.103
linux-image-oracle-lts-20.04 5.4.0.1063.63
linux-image-virtual 5.4.0.99.103
Ubuntu 18.04 LTS:
linux-image-5.4.0-1063-oracle 5.4.0-1063.67~18.04.1
linux-image-5.4.0-1064-gcp 5.4.0-1064.68~18.04.1
linux-image-5.4.0-99-generic 5.4.0-99.112~18.04.1
linux-image-5.4.0-99-generic-lpae 5.4.0-99.112~18.04.1
linux-image-5.4.0-99-lowlatency 5.4.0-99.112~18.04.1
linux-image-aws 5.4.0.1065.47
linux-image-gcp 5.4.0.1064.49
linux-image-generic-hwe-18.04 5.4.0.99.112~18.04.86
linux-image-generic-lpae-hwe-18.04 5.4.0.99.112~18.04.86
linux-image-lowlatency-hwe-18.04 5.4.0.99.112~18.04.86
linux-image-oem 5.4.0.99.112~18.04.86
linux-image-oem-osp1 5.4.0.99.112~18.04.86
linux-image-oracle 5.4.0.1063.67~18.04.42
linux-image-snapdragon-hwe-18.04 5.4.0.99.112~18.04.86
linux-image-virtual-hwe-18.04 5.4.0.99.112~18.04.86
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:
https://ubuntu.com/security/notices/USN-5267-2
https://ubuntu.com/security/notices/USN-5267-1
https://launchpad.net/bugs/1959665
Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-99.112
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1065.68
https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1064.68
https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1014.15
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1055.57
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1063.67
https://launchpad.net/ubuntu/+source/linux-aws-5.4/5.4.0-1065.68~18.04.1
https://launchpad.net/ubuntu/+source/linux-gcp-5.4/5.4.0-1064.68~18.04.1
https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-99.112~18.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1063.67~18.04.1
A: Linux kernel regression update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS.
