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Ubuntu 20.04 LTS USN-5381-1 High: Linux Kernel Denial Of Service

ubuntu
Calendar Grey April 20, 2022
Dist Ubuntu Esm H88
Numerous vulnerabilities addressed in Ubuntu 20.04 LTS concerning the Linux kernel, affecting both system reliability and security.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-5.14: Linux kernel for OEM systems

Details:

David Bouman discovered that the netfilter subsystem in the Linux kernel

did not properly validate passed user register indices. A local attacker

could use this to cause a denial of service or possibly execute arbitrary

code. (CVE-2022-1015)

It was discovered that the block layer subsystem in the Linux kernel did

not properly initialize memory in some situations. A privileged local

attacker could use this to expose sensitive information (kernel memory).

(CVE-2022-0494)

It was discovered that the DMA subsystem in the Linux kernel did not

properly ensure bounce buffers were completely overwritten by the DMA

device. A local attacker could use this to expose sensitive information

(kernel memory). (CVE-2022-0854)

Jann Horn discovered that the FUSE file system in the Linux kernel

contained a use-after-free vulnerability. A loc...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service system update ubuntu linux kernel memory exposure OEM security

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  linux-image-5.14.0-1033-oem     5.14.0-1033.36
  linux-image-oem-20.04           5.14.0.1033.30
  linux-image-oem-20.04b          5.14.0.1033.30
  linux-image-oem-20.04c          5.14.0.1033.30
  linux-image-oem-20.04d          5.14.0.1033.30

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

CVE-2022-0494, CVE-2022-0854, CVE-2022-1011, CVE-2022-1015,

CVE-2022-1016, CVE-2022-1048, CVE-2022-24958, CVE-2022-26490,

CVE-2022-26966, CVE-2022-27223, CVE-2022-28356

April 20, 2022

Topics%20covered

Topics Covered

security advisory denial of service system update ubuntu linux kernel memory exposure OEM security

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.14/5.14.0-1033.36

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