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Ubuntu 20.04 USN-6255-1 Critical: Linux Kernel Denial Of Service

ubuntu
Calendar Grey July 26, 2023
Dist Ubuntu Esm H88
This notification details multiple enhancement patches in the Ubuntu Linux core, tackling significant security flaws proficiently.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-intel-iotg-5.15: Linux kernel for Intel IoT platforms

Details:

It was discovered that the IP-VLAN network driver for the Linux kernel did

not properly initialize memory in some situations, leading to an out-of-

bounds write vulnerability. An attacker could use this to cause a denial of

service (system crash) or possibly execute arbitrary code. (CVE-2023-3090)

Mingi Cho discovered that the netfilter subsystem in the Linux kernel did

not properly validate the status of a nft chain while performing a lookup

by id, leading to a use-after-free vulnerability. An attacker could use

this to cause a denial of service (system crash) or possibly execute

arbitrary code. (CVE-2023-31248)

Querijn Voet discovered that a race condition existed in the io_uring

subsystem in the Linux kernel, leading to a use-after-free vulnerability. A

local attacker could use this to cause a denial of ser...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service update instructions ubuntu linux kernel use-after-free out-of-bounds write

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1036-intel-iotg  5.15.0-1036.41~20.04.1
   linux-image-intel               5.15.0.1036.41~20.04.26
   linux-image-intel-iotg          5.15.0.1036.41~20.04.26

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-6255-1

CVE-2023-3090, CVE-2023-31248, CVE-2023-3389, CVE-2023-3390,

CVE-2023-3439, CVE-2023-35001

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6255-1

Topics%20covered

Topics Covered

security advisory denial of service update instructions ubuntu linux kernel use-after-free out-of-bounds write

Package Information

https://launchpad.net/ubuntu/+source/linux-intel-iotg-5.15/5.15.0-1036.41~20.04.1

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