Linux kernel vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 22.04 LTS
- Ubuntu 14.04 ESM
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
Details
It was discovered that a race condition existed in the io_uring subsystem
in 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-2023-1872)
Lonial Con discovered that the netfilter subsystem in the Linux kernel
contained a memory leak when handling certain element flush operations. A
local attacker could use this to expose sensitive information (kernel
memory). (CVE-2023-4569)
It was discovered that the TLS subsystem in the Linux kernel did not
properly perform cryptographic operations in some situations, leading to a
null pointer dereference vulnerability. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2023-6176)
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)
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)
Notselwyn discovered that the netfilter subsystem in the Linux kernel did
not properly handle verdict parameters in certain cases, 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-2024-1086)
Update instructions
The problem can be corrected by updating your kernel livepatch to the following
versions:
Ubuntu 20.04 LTS
- aws - 102.1
- azure - 102.1
- gcp - 102.1
- generic - 102.1
- gke - 102.1
- gkeop - 102.1
- ibm - 102.1
- lowlatency - 102.1
Ubuntu 18.04 LTS
- aws - 102.1
- azure - 102.1
- gcp - 102.1
- generic - 102.1
- lowlatency - 102.1
Ubuntu 16.04 ESM
- aws - 102.1
- azure - 102.1
- gcp - 102.1
- generic - 102.1
- lowlatency - 102.1
Ubuntu 22.04 LTS
- aws - 102.1
- azure - 102.1
- gcp - 102.1
- generic - 102.1
- gke - 102.1
- ibm - 102.1
- lowlatency - 102.1
Ubuntu 14.04 ESM
- generic - 102.1
- lowlatency - 102.1
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.