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Ubuntu 22.04 LTS USN-5914-1 Critical: Linux Kernel Threats

ubuntu
Calendar Grey March 3, 2023
Dist Ubuntu Esm H88
Addressed several security flaws in the Linux kernel for Ubuntu 22.04 LTS, posing significant risk and exploitability.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.0: Linux kernel for OEM systems

Details:

It was discovered that the Upper Level Protocol (ULP) subsystem in the

Linux kernel did not properly handle sockets entering the LISTEN state in

certain protocols, 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-2023-0461)

It was discovered that the NFSD implementation in the Linux kernel did not

properly handle some RPC messages, leading to a buffer overflow. A remote

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2022-43945)

Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation

in the Linux kernel contained multiple use-after-free vulnerabilities. A

physically proximate attacker could use this to cause a denial of service

(system c...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow critical ubuntu linux kernel use-after-free

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.0.0-1012-oem      6.0.0-1012.12
   linux-image-oem-22.04b          6.0.0.1012.12

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-5914-1

CVE-2022-3567, CVE-2022-42896, CVE-2022-4379, CVE-2022-43945,

CVE-2022-45934, CVE-2022-47520, CVE-2023-0045, CVE-2023-0461,

CVE-2023-0469

Severity
critical
Lowest
Low
Medium
High
Critical

March 03, 2023

Topics%20covered

Topics Covered

security advisory denial of service buffer overflow critical ubuntu linux kernel use-after-free

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1012.12

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