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Ubuntu 16.04 LTS USN-6327-1 Moderate: Linux-KVM Denial of Service

ubuntu
Calendar Grey September 1, 2023
Dist Ubuntu Esm H88
Multiple vulnerabilities detected in the Linux kernel on Ubuntu 16.04 LTS have been documented, along with recommended measures for their remediation.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-kvm: Linux kernel for cloud environments

Details:

Zheng Zhang discovered that the device-mapper implementation in the Linux

kernel did not properly handle locking during table_clear() operations. A

local attacker could use this to cause a denial of service (kernel

deadlock). (CVE-2023-2269)

It was discovered that a use-after-free vulnerability existed in the HFS+

file system implementation in the Linux kernel. A local attacker could

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

(CVE-2023-2985)

It was discovered that the DVB Core driver in the Linux kernel did not

properly handle locking events in certain situations. A local attacker

could use this to cause a denial of service (kernel deadlock).

(CVE-2023-31084)

It was discovered that the virtual terminal driver in the Linux kernel

contained a use-after-free vulnerability. A local attacker could use th...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel local access ubuntu system crash linux-kvm

Update Instructions

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

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   linux-image-4.4.0-1123-kvm      4.4.0-1123.133
   linux-image-kvm                 4.4.0.1123.120

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-6327-1

CVE-2023-2269, CVE-2023-2985, CVE-2023-31084, CVE-2023-3567,

CVE-2023-3611, CVE-2023-3776

Ubuntu Security Notice USN-6327-1

Topics%20covered

Topics Covered

security advisory denial of service kernel local access ubuntu system crash linux-kvm

Package Information

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