[USN-6123-1] Linux kernel (OEM) vulnerabilities
==========================================================================
Ubuntu Security Notice USN-6123-1
May 30, 2023
linux-oem-6.0 vulnerabilities
==========================================================================
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:
Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
leading to 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-2023-32233)
Reima Ishii discovered that the nested KVM implementation for Intel x86
processors in the Linux kernel did not properly validate control registers
in certain situations. An attacker in a guest VM could use this to cause a
denial of service (guest crash). (CVE-2023-30456)
It was discovered that the Xircom PCMCIA network device driver in the Linux
kernel did not properly handle device removal events. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2023-1670)
Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu
Linux kernel contained a race condition when handling inode locking in some
situations. A local attacker could use this to cause a denial of service
(kernel deadlock). (CVE-2023-2612)
It was discovered that the NTFS file system implementation in the Linux
kernel did not properly handle a loop termination condition, leading to an
out-of-bounds read vulnerability. A local attacker could use this to cause
a denial of service (system crash) or possibly expose sensitive
information. (CVE-2023-26606)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS:
linux-image-6.0.0-1017-oem 6.0.0-1017.17
linux-image-oem-22.04b 6.0.0.1017.17
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-6123-1
CVE-2023-1670, CVE-2023-2612, CVE-2023-26606, CVE-2023-30456,
CVE-2023-32233
Package Information:
https://launchpad.net/ubuntu/+source/linux-oem-6.0/6.0.0-1017.17
A Linux kernel (OEM) security update has been released for Ubuntu Linux 22.04 LTS.
