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Ubuntu 22.04 LTS USN-6497-1 Moderate: Kernel Denial of Service Issues

ubuntu
Calendar Grey November 21, 2023
Dist Ubuntu Esm H88
The latest Ubuntu notice USN-6497-1 highlights multiple vulnerabilities within the Linux kernel that affect OEM devices.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.1: Linux kernel for OEM systems

Details:

Maxim Levitsky discovered that the KVM nested virtualization (SVM)

implementation for AMD processors in the Linux kernel did not properly

handle x2AVIC MSRs. An attacker in a guest VM could use this to cause a

denial of service (host kernel crash). (CVE-2023-5090)

Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel

did not properly handle queue initialization failures in certain

situations, leading to a use-after-free vulnerability. A remote attacker

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

execute arbitrary code. (CVE-2023-5178)

Budimir Markovic discovered that the perf subsystem in the Linux kernel

did not properly handle event groups, leading to an out-of-bounds write

vulnerability. A local attacker could use this to cause a denial of

service (system crash) or possibly e...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu kernel system update 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-6.1.0-1026-oem      6.1.0-1026.26
   linux-image-oem-22.04           6.1.0.1026.27
   linux-image-oem-22.04a          6.1.0.1026.27
   linux-image-oem-22.04b          6.1.0.1026.27
   linux-image-oem-22.04c          6.1.0.1026.27

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-6497-1

CVE-2023-5090, CVE-2023-5178, CVE-2023-5717

Ubuntu Security Notice USN-6497-1

Topics%20covered

Topics Covered

security advisory moderate denial of service Ubuntu kernel system update use-after-free

Package Information

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