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Ubuntu 23.10 USN-6652-1 Critical: Azure Kernel Denial Of Service

ubuntu
Calendar Grey February 26, 2024
Dist Ubuntu Esm H88
Several vulnerabilities patched in Ubuntu Linux kernel Azure, mitigating potential service interruptions and crash hazards. Upgrade is advised.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

Details:

Marek Marczykowski-Górecki discovered that the Xen event channel

infrastructure implementation in the Linux kernel contained a race

condition. An attacker in a guest VM could possibly use this to cause a

denial of service (paravirtualized device unavailability). (CVE-2023-34324)

Zheng Wang discovered a use-after-free in the Renesas Ethernet AVB driver

in the Linux kernel during device removal. A privileged attacker could use

this to cause a denial of service (system crash). (CVE-2023-35827)

Tom Dohrmann discovered that the Secure Encrypted Virtualization (SEV)

implementation for AMD processors in the Linux kernel contained a race

condition when accessing MMIO registers. A local attacker in a SEV guest VM

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

possibly execute arbitrary code. (C...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service software update system crash linux-azure

Update Instructions

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

Ubuntu 23.10:
   linux-image-6.5.0-1015-azure    6.5.0-1015.15
   linux-image-6.5.0-1015-azure-fde  6.5.0-1015.15
   linux-image-azure               6.5.0.1015.17
   linux-image-azure-fde           6.5.0.1015.17

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-6652-1

CVE-2023-34324, CVE-2023-35827, CVE-2023-46813, CVE-2023-46862,

CVE-2023-51780, CVE-2023-51781, CVE-2023-5972, CVE-2023-6176,

CVE-2023-6531, CVE-2023-6622, CVE-2023-6915, CVE-2024-0565,

CVE-2024-0582, CVE-2024-0641, CVE-2024-0646

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6652-1

Topics%20covered

Topics Covered

security advisory denial of service software update system crash linux-azure

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/6.5.0-1015.15

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