1. Ubuntu Security Notices
  2. USN-6648-1

USN-6648-1: Linux kernel vulnerabilities

Publication date

22 February 2024

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

Details

It was discovered that a race condition existed in the AppleTalk networking
subsystem of the Linux kernel, 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-2023-51781)

Zhenghan Wang discovered that the generic ID allocator implementation in
the Linux kernel did not properly check for null bitmap when releasing IDs.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2023-6915)

Robert Morris discovered that the CIFS network file system implementation
in the Linux kernel did not properly validate certain server commands
fields, leading to an out-of-bounds read vulnerability. An attacker could
use this to cause a denial of service (system crash) or possibly expose
sensitive information. (

It was discovered that a race condition existed in the AppleTalk networking
subsystem of the Linux kernel, 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-2023-51781)

Zhenghan Wang discovered that the generic ID allocator implementation in
the Linux kernel did not properly check for null bitmap when releasing IDs.
A local attacker could use this to cause a denial of service (system
crash). (CVE-2023-6915)

Robert Morris discovered that the CIFS network file system implementation
in the Linux kernel did not properly validate certain server commands
fields, leading to an out-of-bounds read vulnerability. An attacker could
use this to cause a denial of service (system crash) or possibly expose
sensitive information. (CVE-2024-0565)

Jann Horn discovered that the TLS subsystem in the Linux kernel did not
properly handle spliced messages, leading to an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2024-0646)

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-5.4.0-1031-iot –  5.4.0-1031.32
linux-image-5.4.0-1038-xilinx-zynqmp –  5.4.0-1038.42
linux-image-5.4.0-1066-ibm –  5.4.0-1066.71
linux-image-5.4.0-1079-bluefield –  5.4.0-1079.85
linux-image-5.4.0-1086-gkeop –  5.4.0-1086.90
linux-image-5.4.0-1103-raspi –  5.4.0-1103.115
linux-image-5.4.0-1107-kvm –  5.4.0-1107.114
linux-image-5.4.0-1118-oracle –  5.4.0-1118.127
linux-image-5.4.0-1119-aws –  5.4.0-1119.129
linux-image-5.4.0-1123-gcp –  5.4.0-1123.132
linux-image-5.4.0-172-generic –  5.4.0-172.190
linux-image-5.4.0-172-generic-lpae –  5.4.0-172.190
linux-image-5.4.0-172-lowlatency –  5.4.0-172.190
linux-image-aws-lts-20.04 –  5.4.0.1119.116
linux-image-bluefield –  5.4.0.1079.74
linux-image-gcp-lts-20.04 –  5.4.0.1123.125
linux-image-generic –  5.4.0.172.170
linux-image-generic-lpae –  5.4.0.172.170
linux-image-gkeop –  5.4.0.1086.84
linux-image-gkeop-5.4 –  5.4.0.1086.84
linux-image-ibm-lts-20.04 –  5.4.0.1066.95
linux-image-kvm –  5.4.0.1107.103
linux-image-lowlatency –  5.4.0.172.170
linux-image-oem –  5.4.0.172.170
linux-image-oem-osp1 –  5.4.0.172.170
linux-image-oracle-lts-20.04 –  5.4.0.1118.111
linux-image-raspi –  5.4.0.1103.133
linux-image-raspi2 –  5.4.0.1103.133
linux-image-virtual –  5.4.0.172.170
linux-image-xilinx-zynqmp –  5.4.0.1038.38
18.04 bionic linux-image-5.4.0-1066-ibm –  5.4.0-1066.71~18.04.1  
linux-image-5.4.0-1103-raspi –  5.4.0-1103.115~18.04.1  
linux-image-5.4.0-1118-oracle –  5.4.0-1118.127~18.04.1  
linux-image-5.4.0-1119-aws –  5.4.0-1119.129~18.04.1  
linux-image-5.4.0-1123-gcp –  5.4.0-1123.132~18.04.1  
linux-image-5.4.0-172-generic –  5.4.0-172.190~18.04.1  
linux-image-5.4.0-172-lowlatency –  5.4.0-172.190~18.04.1  
linux-image-aws –  5.4.0.1119.97  
linux-image-gcp –  5.4.0.1123.99  
linux-image-generic-hwe-18.04 –  5.4.0.172.190~18.04.140  
linux-image-ibm –  5.4.0.1066.76  
linux-image-lowlatency-hwe-18.04 –  5.4.0.172.190~18.04.140  
linux-image-oem –  5.4.0.172.190~18.04.140  
linux-image-oem-osp1 –  5.4.0.172.190~18.04.140  
linux-image-oracle –  5.4.0.1118.127~18.04.90  
linux-image-raspi-hwe-18.04 –  5.4.0.1103.100  
linux-image-snapdragon-hwe-18.04 –  5.4.0.172.190~18.04.140  
linux-image-virtual-hwe-18.04 –  5.4.0.172.190~18.04.140  

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References

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