[USN-6206-1] Linux kernel (OEM) vulnerabilities
Rodrigo Figueiredo Zaiden
rodrigo.zaiden at canonical.com
Thu Jul 6 19:12:56 UTC 2023
Ubuntu Security Notice USN-6206-1
July 06, 2023
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
Several security issues were fixed in the Linux kernel.
- linux-oem-5.17: Linux kernel for OEM systems
Hangyu Hua discovered that the Flower classifier implementation in the
Linux kernel contained an out-of-bounds write vulnerability. An attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-35788, LP: #2023577)
It was discovered that the NTFS file system implementation in the Linux
kernel contained a null pointer dereference in some situations. A local
attacker could use this to cause a denial of service (system crash).
Seth Jenkins discovered that the CPU data to memory implementation for x86
processors in the Linux kernel did not properly perform address
randomization. A local attacker could use this to expose sensitive
information (kernel memory) or in conjunction with another kernel
It was discovered that the XFS file system implementation in the Linux
kernel did not properly perform metadata validation when mounting certain
images. An attacker could use this to specially craft a file system image
that, when mounted, could cause a denial of service (system crash).
It was discovered that for some Intel processors the INVLPG instruction
implementation did not properly flush global TLB entries when PCIDs are
enabled. An attacker could use this to expose sensitive information
(kernel memory) or possibly cause undesired behaviors. (LP: #2023220)
The problem can be corrected by updating your system to the following
Ubuntu 22.04 LTS:
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.
CVE-2022-4842, CVE-2023-0597, CVE-2023-2124, CVE-2023-35788
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