USN-5729-2: Linux kernel vulnerabilities
18 November 2022
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux-gcp-5.15 - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke-5.15 - Linux kernel for Google Container Engine (GKE) systems
- linux-intel-iotg - Linux kernel for Intel IoT platforms
- linux-raspi - Linux kernel for Raspberry Pi systems
Details
It was discovered that a race condition existed in the instruction emulator
of the Linux kernel on Arm 64-bit systems. A local attacker could use this
to cause a denial of service (system crash). (CVE-2022-20422)
Hsin-Wei Hung discovered that the BPF subsystem in the Linux kernel
contained an out-of-bounds read vulnerability in the x86 JIT compiler. A
local attacker could possibly use this to cause a denial of service (system
crash) or expose sensitive information (kernel memory). (CVE-2022-2905)
Hao Sun and Jiacheng Xu discovered that the NILFS file system
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-2022-2978)
Abhishek Shah discovered a race condition in the PF_KEYv2 implementation in
the Linux kernel. A local attacker could use this to cause a denial of
service (system crash) or possibly expose sensitive information (kernel
memory). (CVE-2022-3028)
It was discovered that the Netlink device interface implementation in the
Linux kernel did not properly handle certain error conditions, leading to a
use-after-free vulnerability with some network device drivers. A local
attacker with admin access to the network device could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2022-3625)
It was discovered that the IDT 77252 ATM PCI device driver in the Linux
kernel did not properly remove any pending timers during device exit,
resulting in a use-after-free vulnerability. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2022-3635)
Gwangun Jung discovered that the netfilter subsystem in the Linux kernel
did not properly prevent binding to an already bound chain. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2022-39190)
Xingyuan Mo and Gengjia Chen discovered that the Promise SuperTrak EX
storage controller driver in the Linux kernel did not properly handle
certain structures. A local attacker could potentially use this to expose
sensitive information (kernel memory). (CVE-2022-40768)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04
-
linux-image-intel-iotg
-
5.15.0.1018.19
-
linux-image-raspi-nolpae
-
5.15.0.1018.17
-
linux-image-5.15.0-1018-intel-iotg
-
5.15.0-1018.23
-
linux-image-raspi
-
5.15.0.1018.17
-
linux-image-5.15.0-1018-raspi
-
5.15.0-1018.20
-
linux-image-5.15.0-1018-raspi-nolpae
-
5.15.0-1018.20
Ubuntu 20.04
-
linux-image-5.15.0-1020-gke
-
5.15.0-1020.25~20.04.1
-
linux-image-5.15.0-1022-gcp
-
5.15.0-1022.29~20.04.1
-
linux-image-gcp
-
5.15.0.1022.29~20.04.1
-
linux-image-gke-5.15
-
5.15.0.1020.25~20.04.1
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.