1. Ubuntu Security Notices
  2. USN-6251-1

USN-6251-1: Linux kernel vulnerabilities

Publication date

26 July 2023

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that the IP-VLAN network driver for the Linux kernel did
not properly initialize memory in some situations, leading to 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-2023-3090)

Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in
the Ubuntu Linux kernel did not properly perform permission checks in
certain situations. A local attacker could possibly use this to gain
elevated privileges. (CVE-2023-32629)

It was discovered that the netfilter subsystem in the Linux kernel did not
properly handle some error conditions, 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. (

It was discovered that the IP-VLAN network driver for the Linux kernel did
not properly initialize memory in some situations, leading to 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-2023-3090)

Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in
the Ubuntu Linux kernel did not properly perform permission checks in
certain situations. A local attacker could possibly use this to gain
elevated privileges. (CVE-2023-32629)

It was discovered that the netfilter subsystem in the Linux kernel did not
properly handle some error conditions, 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-2023-3390)

Tanguy Dubroca discovered that the netfilter subsystem in the Linux kernel
did not properly handle certain pointer data type, leading to an out-of-
bounds write vulnerability. A privileged attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-35001)

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
20.04 focal linux-image-5.4.0-155-generic-lpae –  5.4.0-155.172
linux-image-gkeop-5.4 –  5.4.0.1073.71
linux-image-gkeop –  5.4.0.1073.71
linux-image-virtual –  5.4.0.155.151
linux-image-5.4.0-1105-oracle –  5.4.0-1105.114
linux-image-generic –  5.4.0.155.151
linux-image-oem –  5.4.0.155.151
linux-image-ibm –  5.4.0.1053.79
linux-image-oem-osp1 –  5.4.0.155.151
linux-image-xilinx-zynqmp –  5.4.0.1026.28
linux-image-azure-lts-20.04 –  5.4.0.1112.105
linux-image-5.4.0-1095-kvm –  5.4.0-1095.101
linux-image-5.4.0-155-generic –  5.4.0-155.172
linux-image-5.4.0-1104-gke –  5.4.0-1104.111
linux-image-5.4.0-1053-ibm –  5.4.0-1053.58
linux-image-5.4.0-1106-aws –  5.4.0-1106.114
linux-image-5.4.0-1109-gcp –  5.4.0-1109.118
linux-image-gcp-lts-20.04 –  5.4.0.1109.111
linux-image-ibm-lts-20.04 –  5.4.0.1053.79
linux-image-aws-lts-20.04 –  5.4.0.1106.103
linux-image-raspi2 –  5.4.0.1090.120
linux-image-5.4.0-155-lowlatency –  5.4.0-155.172
linux-image-gke –  5.4.0.1104.109
linux-image-raspi –  5.4.0.1090.120
linux-image-5.4.0-1112-azure –  5.4.0-1112.118
linux-image-gke-5.4 –  5.4.0.1104.109
linux-image-5.4.0-1090-raspi –  5.4.0-1090.101
linux-image-5.4.0-1026-xilinx-zynqmp –  5.4.0-1026.30
linux-image-kvm –  5.4.0.1095.90
linux-image-5.4.0-1073-gkeop –  5.4.0-1073.77
linux-image-oracle-lts-20.04 –  5.4.0.1105.98
linux-image-generic-lpae –  5.4.0.155.151
linux-image-lowlatency –  5.4.0.155.151
18.04 bionic linux-image-5.4.0-155-generic-lpae –  5.4.0-155.172~18.04.1  
linux-image-generic-hwe-18.04 –  5.4.0.155.172~18.04.125  
linux-image-snapdragon-hwe-18.04 –  5.4.0.155.172~18.04.125  
linux-image-5.4.0-1105-oracle –  5.4.0-1105.114~18.04.1  
linux-image-oem –  5.4.0.155.172~18.04.125  
linux-image-aws –  5.4.0.1106.84  
linux-image-raspi-hwe-18.04 –  5.4.0.1090.87  
linux-image-ibm –  5.4.0.1053.64  
linux-image-oem-osp1 –  5.4.0.155.172~18.04.125  
linux-image-generic-lpae-hwe-18.04 –  5.4.0.155.172~18.04.125  
linux-image-5.4.0-1109-gcp –  5.4.0-1109.118~18.04.1  
linux-image-5.4.0-155-generic –  5.4.0-155.172~18.04.1  
linux-image-5.4.0-1053-ibm –  5.4.0-1053.58~18.04.1  
linux-image-azure –  5.4.0.1112.85  
linux-image-5.4.0-1106-aws –  5.4.0-1106.114~18.04.1  
linux-image-gcp –  5.4.0.1109.85  
linux-image-5.4.0-155-lowlatency –  5.4.0-155.172~18.04.1  
linux-image-oracle –  5.4.0.1105.114~18.04.77  
linux-image-5.4.0-1112-azure –  5.4.0-1112.118~18.04.1  
linux-image-virtual-hwe-18.04 –  5.4.0.155.172~18.04.125  
linux-image-lowlatency-hwe-18.04 –  5.4.0.155.172~18.04.125  
linux-image-5.4.0-1090-raspi –  5.4.0-1090.101~18.04.1  

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References

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