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Ubuntu 20.04 LTS USN-5877-1 Critical: Kernel Denial of Service Threats

ubuntu
Calendar Grey February 15, 2023
Dist Ubuntu Esm H88
Serious kernel vulnerabilities resolved in Ubuntu 20.04 LTS. Ensure you update immediately to safeguard your system from risks and weaknesses.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gke-5.15: Linux kernel for Google Container Engine (GKE) systems

Details:

Kyle Zeng discovered that the sysctl implementation in the Linux kernel

contained a stack-based buffer overflow. A local attacker could use this to

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

(CVE-2022-4378)

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 crash) or possibly execute arbitrary code. (CVE-2022-42896)

Mingwei Zhang discovered that the KVM implementation for AMD processors in

the Linux kernel did not properly handle cache coherency with Secure

Encrypted Virtualization (SEV). A local attacker could possibly use this to

cause a denial of service (host system crash). (CVE-2022-0171)

It...

Read the Full Advisory

Topics%20covered

Topics Covered

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

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1027-gke     5.15.0-1027.32~20.04.1
   linux-image-gke-5.15            5.15.0.1027.32~20.04.1

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-2022-0171, CVE-2022-20421, CVE-2022-2663, CVE-2022-3061,

CVE-2022-3303, CVE-2022-3543, CVE-2022-3586, CVE-2022-3619,

CVE-2022-3623, CVE-2022-3628, CVE-2022-3640, CVE-2022-3643,

CVE-2022-3646, CVE-2022-3649, CVE-2022-39188, CVE-2022-39842,

CVE-2022-40307, CVE-2022-4095, CVE-2022-41849, CVE-2022-41850,

CVE-2022-42895, CVE-2022-42896, CVE-2022-43750, CVE-2022-4378,

CVE-2022-45934, CVE-2022-4662, CVE-2022-47940, CVE-2023-0590

Severity
critical
Lowest
Low
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Critical

February 15, 2023

Topics%20covered

Topics Covered

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

Package Information

https://launchpad.net/ubuntu/+source/linux-gke-5.15/5.15.0-1027.32~20.04.1

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