A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 22.04 LTS

Summary

Several security issues were fixed in the kernel.

Software Description

- linux - Linux kernel
- linux-aws - Linux kernel for Amazon Web Services (AWS) systems
- linux-azure - Linux kernel for Microsoft Azure Cloud systems
- linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
- linux-gke - Linux kernel for Google Container Engine (GKE) systems
- linux-gkeop - Linux kernel for Google Container Engine (GKE) systems
- linux-ibm - Linux kernel for IBM cloud systems
- linux-oracle - Linux kernel for Oracle Cloud systems

Details

It was discovered that the ATA over Ethernet (AoE) driver in the Linux
kernel contained a race condition, leading to a use-after-free
vulnerability. An attacker could use this to cause a denial of service
or possibly execute arbitrary code. (CVE-2023-6270)

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)

In the Linux kernel, the following vulnerability has been
resolved: netfilter: nft_set_rbtree: skip end interval element from gc
rbtree lazy gc on insert might collect an end interval element that has
been just added in this transactions, skip end interval elements that
are not yet active. (CVE-2024-26581)

In the Linux kernel, the following vulnerability has been
resolved: net: qualcomm: rmnet: fix global oob in rmnet_policy The
variable rmnet_link_ops assign a bigger maxtype which leads to a global
out-of- bounds read when parsing the netlink attributes. (CVE-2024-26597)

Update instructions

The problem can be corrected by updating your kernel livepatch to the
following versions:

Ubuntu 20.04 LTS
aws - 104.1
azure - 104.1
gcp - 104.1
generic - 104.1
gke - 104.1
gkeop - 104.1
ibm - 104.1
lowlatency - 104.1
oracle - 104.1

Ubuntu 18.04 LTS
generic - 104.1
lowlatency - 104.1

Ubuntu 22.04 LTS
aws - 104.1
azure - 104.1
gcp - 104.1
generic - 104.1
gke - 104.1
ibm - 104.1
lowlatency - 104.1
oracle - 104.1

Support Information

Livepatches for supported LTS kernels will receive upgrades for a period
of up to 13 months after the build date of the kernel.

Livepatches for supported HWE kernels which are not based on an LTS
kernel version will receive upgrades for a period of up to 9 months
after the build date of the kernel, or until the end of support for that
kernel’s non-LTS distro release version, whichever is sooner.

References

- CVE-2023-6270
- CVE-2023-51781
- CVE-2024-26581
- CVE-2024-26597