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Alerts This Week
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Ubuntu 16.04 ESM: USN-6007-1 Critical: Linux Kernel Denial of Service

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Calendar Grey April 11, 2023
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Ubuntu Security Notice USN-6007-1 addresses serious vulnerabilities in the Linux kernel, urging GCP administrators to update systems quickly for enhanced security.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) 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 an out-of-bounds write vulnerability existed in the

Video for Linux 2 (V4L2) implementation in the Linux kernel. A local

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

possibly execute arbitrary code. (CVE-2022-20369)

Pawan Kumar Gupta, Alyssa Milburn, Amit Peled, Shani Rehana, Nir Shildan

and Ariel Sabba discovered that some Intel processors with Enhanced

Indirect Branch Restricted Speculation (eIBRS) did not properly handle RET

...

Read the Full Advisory

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Topics Covered

security advisory denial of service critical ubuntu kernel issues linux-gcp

Update Instructions

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

Ubuntu 16.04 ESM:
   linux-image-4.15.0-1146-gcp     4.15.0-1146.162~16.04.1
   linux-image-gcp                 4.15.0.1146.136
   linux-image-gke                 4.15.0.1146.136

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-6007-1

CVE-2022-20369, CVE-2022-26373, CVE-2022-2663, CVE-2022-29900,

CVE-2022-29901, CVE-2022-3521, CVE-2022-3545, CVE-2022-3628,

CVE-2022-3640, CVE-2022-3646, CVE-2022-3649, CVE-2022-39842,

CVE-2022-41849, CVE-2022-41850, CVE-2022-42328, CVE-2022-42329,

CVE-2022-42895, CVE-2022-43750, CVE-2023-0461, CVE-2023-26607

Severity
critical
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Critical

April 11, 2023

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Topics Covered

security advisory denial of service critical ubuntu kernel issues linux-gcp

Package Information

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