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Ubuntu: 5758-1 Critical: Kernel Memory And Security Flaws

ubuntu
Calendar Grey December 1, 2022
Dist Ubuntu Esm H88
Several vulnerabilities addressed in the Linux kernel. Prompt updates recommended to ensure system protection and security.
Several security issues were fixed in the Linux kernel.

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-kvm: Linux kernel for cloud environments

- linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty

Details:

Jann Horn discovered that the Linux kernel did not properly track memory

allocations for anonymous VMA mappings in some situations, leading to

potential data structure reuse. A local attacker could use this to cause a

denial of service (system crash) or possibly execute arbitrary code.

(CVE-2022-42703)

It was discovered that the video4linux driver for Empia based TV cards in

the Linux kernel did not properly perform reference counting in some

situations, 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-2022-3239)

It was discovered that a memory leak exi...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel memory issue system crash

Update Instructions

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

Ubuntu 16.04 ESM:
   linux-image-4.4.0-1115-kvm      4.4.0-1115.125
   linux-image-4.4.0-1152-aws      4.4.0-1152.167
   linux-image-4.4.0-235-generic   4.4.0-235.269
   linux-image-4.4.0-235-lowlatency  4.4.0-235.269
   linux-image-aws                 4.4.0.1152.156
   linux-image-generic             4.4.0.235.241
   linux-image-kvm                 4.4.0.1115.112
   linux-image-lowlatency          4.4.0.235.241
   linux-image-virtual             4.4.0.235.241

Ubuntu 14.04 ESM:
   linux-image-4.4.0-1114-aws      4.4.0-1114.120
   linux-image-4.4.0-235-generic   4.4.0-235.269~14.04.1
   linux-image-4.4.0-235-lowlatency  4.4.0-235.269~14.04.1
   linux-image-aws                 4.4.0.1114.111
   linux-image-generic-lts-xenial  4.4.0.235.204
   linux-image-lowlatency-lts-xenial  4.4.0.235.204
   linux-image-virtual-lts-xenial  4.4.0.235.204

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-5758-1

CVE-2022-3239, CVE-2022-3524, CVE-2022-3564, CVE-2022-3565,

CVE-2022-3566, CVE-2022-3567, CVE-2022-3594, CVE-2022-3621,

CVE-2022-3635, CVE-2022-3649, CVE-2022-40768, CVE-2022-42703,

CVE-2022-43750

Severity
critical
Lowest
Low
Medium
High
Critical

December 01, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel memory issue system crash

Package Information

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