USN-5977-1: Linux kernel (OEM) vulnerabilities
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Ubuntu Security Notice USN-5977-1
March 27, 2023
linux-oem-6.0 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
- linux-oem-6.0: Linux kernel for OEM systems
Details:
It was discovered that the network queuing discipline implementation in the
Linux kernel contained 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-2023-1281)
It was discovered that the KVM VMX implementation in the Linux kernel did
not properly handle indirect branch prediction isolation between L1 and L2
VMs. An attacker in a guest VM could use this to expose sensitive
information from the host OS or other guest VMs. (CVE-2022-2196)
Thadeu Cascardo discovered that the io_uring subsystem contained a double-
free vulnerability in certain memory allocation error conditions. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2023-1032)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS:
linux-image-6.0.0-1013-oem 6.0.0-1013.13
linux-image-oem-22.04b 6.0.0.1013.13
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-5977-1
CVE-2022-2196, CVE-2023-1032, CVE-2023-1281
Package Information:
https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1013.13
A Linux kernel (OEM) security update has been released for Ubuntu Linux 22.04 LTS.
