USN-6417-1: Linux kernel vulnerabilities
4 October 2023
Several security issues were fixed in the Linux kernel.
Releases
Packages
- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-azure-5.4 - Linux kernel for Microsoft Azure cloud systems
- linux-bluefield - Linux kernel for NVIDIA BlueField platforms
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-5.4 - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
- linux-hwe-5.4 - Linux hardware enablement (HWE) kernel
- linux-ibm - Linux kernel for IBM cloud systems
- linux-ibm-5.4 - Linux kernel for IBM cloud systems
- linux-iot - Linux kernel for IoT platforms
- linux-kvm - Linux kernel for cloud environments
- linux-oracle - Linux kernel for Oracle Cloud systems
- linux-oracle-5.4 - Linux kernel for Oracle Cloud systems
- linux-raspi - Linux kernel for Raspberry Pi systems
- linux-raspi-5.4 - Linux kernel for Raspberry Pi systems
- linux-xilinx-zynqmp - Linux kernel for Xilinx ZynqMP processors
Details
It was discovered that the eBPF implementation in the Linux kernel
contained a race condition around read-only maps. A privileged attacker
could use this to modify read-only maps. (CVE-2021-4001)
It was discovered that the IPv6 implementation in the Linux kernel
contained a high rate of hash collisions in connection lookup table. A
remote attacker could use this to cause a denial of service (excessive CPU
consumption). (CVE-2023-1206)
Yang Lan discovered that the GFS2 file system implementation in the Linux
kernel could attempt to dereference a null pointer in some situations. An
attacker could use this to construct a malicious GFS2 image that, when
mounted and operated on, could cause a denial of service (system crash).
(CVE-2023-3212)
Davide Ornaghi discovered that the DECnet network protocol implementation
in the Linux kernel contained a null pointer dereference vulnerability. A
remote attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. Please note that kernel support for the
DECnet has been removed to resolve this CVE. (CVE-2023-3338)
It was discovered that the NFC implementation in the Linux kernel contained
a use-after-free vulnerability when performing peer-to-peer communication
in certain conditions. A privileged attacker could use this to cause a
denial of service (system crash) or possibly expose sensitive information
(kernel memory). (CVE-2023-3863)
It was discovered that the TUN/TAP driver in the Linux kernel did not
properly initialize socket data. A local attacker could use this to cause a
denial of service (system crash). (CVE-2023-4194)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04
-
linux-image-5.4.0-1023-iot
-
5.4.0-1023.24
-
linux-image-5.4.0-1031-xilinx-zynqmp
-
5.4.0-1031.35
-
linux-image-5.4.0-1058-ibm
-
5.4.0-1058.63
-
linux-image-5.4.0-1072-bluefield
-
5.4.0-1072.78
-
linux-image-5.4.0-1078-gkeop
-
5.4.0-1078.82
-
linux-image-5.4.0-1095-raspi
-
5.4.0-1095.106
-
linux-image-5.4.0-1100-kvm
-
5.4.0-1100.106
-
linux-image-5.4.0-1110-oracle
-
5.4.0-1110.119
-
linux-image-5.4.0-1111-aws
-
5.4.0-1111.120
-
linux-image-5.4.0-1115-gcp
-
5.4.0-1115.124
-
linux-image-5.4.0-1117-azure
-
5.4.0-1117.124
-
linux-image-5.4.0-164-generic
-
5.4.0-164.181
-
linux-image-5.4.0-164-generic-lpae
-
5.4.0-164.181
-
linux-image-5.4.0-164-lowlatency
-
5.4.0-164.181
-
linux-image-aws-lts-20.04
-
5.4.0.1111.108
-
linux-image-azure-lts-20.04
-
5.4.0.1117.110
-
linux-image-bluefield
-
5.4.0.1072.67
-
linux-image-gcp-lts-20.04
-
5.4.0.1115.117
-
linux-image-generic
-
5.4.0.164.161
-
linux-image-generic-lpae
-
5.4.0.164.161
-
linux-image-gkeop
-
5.4.0.1078.76
-
linux-image-gkeop-5.4
-
5.4.0.1078.76
-
linux-image-ibm-lts-20.04
-
5.4.0.1058.87
-
linux-image-kvm
-
5.4.0.1100.95
-
linux-image-lowlatency
-
5.4.0.164.161
-
linux-image-oem
-
5.4.0.164.161
-
linux-image-oem-osp1
-
5.4.0.164.161
-
linux-image-oracle-lts-20.04
-
5.4.0.1110.103
-
linux-image-raspi
-
5.4.0.1095.125
-
linux-image-raspi2
-
5.4.0.1095.125
-
linux-image-virtual
-
5.4.0.164.161
-
linux-image-xilinx-zynqmp
-
5.4.0.1031.32
Ubuntu 18.04
-
linux-image-5.4.0-1058-ibm
-
5.4.0-1058.63~18.04.1
Available with Ubuntu Pro
-
linux-image-5.4.0-1095-raspi
-
5.4.0-1095.106~18.04.1
Available with Ubuntu Pro
-
linux-image-5.4.0-1110-oracle
-
5.4.0-1110.119~18.04.1
Available with Ubuntu Pro
-
linux-image-5.4.0-1111-aws
-
5.4.0-1111.120~18.04.1
Available with Ubuntu Pro
-
linux-image-5.4.0-1115-gcp
-
5.4.0-1115.124~18.04.1
Available with Ubuntu Pro
-
linux-image-5.4.0-1117-azure
-
5.4.0-1117.124~18.04.1
Available with Ubuntu Pro
-
linux-image-5.4.0-164-generic
-
5.4.0-164.181~18.04.1
Available with Ubuntu Pro
-
linux-image-5.4.0-164-lowlatency
-
5.4.0-164.181~18.04.1
Available with Ubuntu Pro
-
linux-image-aws
-
5.4.0.1111.89
Available with Ubuntu Pro
-
linux-image-azure
-
5.4.0.1117.90
Available with Ubuntu Pro
-
linux-image-gcp
-
5.4.0.1115.91
Available with Ubuntu Pro
-
linux-image-generic-hwe-18.04
-
5.4.0.164.181~18.04.131
Available with Ubuntu Pro
-
linux-image-ibm
-
5.4.0.1058.69
Available with Ubuntu Pro
-
linux-image-lowlatency-hwe-18.04
-
5.4.0.164.181~18.04.131
Available with Ubuntu Pro
-
linux-image-oem
-
5.4.0.164.181~18.04.131
Available with Ubuntu Pro
-
linux-image-oem-osp1
-
5.4.0.164.181~18.04.131
Available with Ubuntu Pro
-
linux-image-oracle
-
5.4.0.1110.119~18.04.82
Available with Ubuntu Pro
-
linux-image-raspi-hwe-18.04
-
5.4.0.1095.92
Available with Ubuntu Pro
-
linux-image-snapdragon-hwe-18.04
-
5.4.0.164.181~18.04.131
Available with Ubuntu Pro
-
linux-image-virtual-hwe-18.04
-
5.4.0.164.181~18.04.131
Available with Ubuntu Pro
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.
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