[LSN-0086-1] Linux kernel vulnerability
benjamin.romer at canonical.com
benjamin.romer at canonical.com
Thu Jun 2 13:41:03 UTC 2022
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
- linux-oem - Linux kernel for OEM systems
Details
It was discovered that a race condition existed in the network
scheduling 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-2021-39713)
Yiqi Sun and Kevin Wang discovered that the cgroups implementation in
the Linux kernel did not properly restrict access to the cgroups v1
release_agent feature. A local attacker could use this to gain
administrative privileges. (CVE-2022-0492)
It was discovered that the network traffic control implementation in the
Linux kernel contained 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-2022-1055)
Bing-Jhong Billy Jheng discovered that the io_uring subsystem in the
Linux kernel contained in integer overflow. A local attacker could use
this to cause a denial of service (system crash) or execute arbitrary
code. (CVE-2022-1116)
It was discovered that the Linux kernel did not properly restrict access
to the kernel debugger when booted in secure boot environments. A
privileged attacker could use this to bypass UEFI Secure Boot
restrictions. (CVE-2022-21499)
Kyle Zeng discovered that the Network Queuing and Scheduling subsystem
of the Linux kernel did not properly perform reference counting in some
situations, leading to a use-after-free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2022-29581)
Jann Horn discovered that the Linux kernel did not properly enforce
seccomp restrictions in some situations. A local attacker could use this
to bypass intended seccomp sandbox restrictions. (CVE-2022-30594)
Update instructions
The problem can be corrected by updating your kernel livepatch to the
following versions:
Ubuntu 20.04 LTS
aws - 86.3
azure - 86.3
gcp - 86.3
generic - 86.3
gke - 86.3
gkeop - 86.3
ibm - 86.3
lowlatency - 86.3
Ubuntu 18.04 LTS
aws - 86.3
azure - 86.3
gcp - 86.3
generic - 86.3
gke - 86.3
gkeop - 86.3
ibm - 86.3
lowlatency - 86.3
oem - 86.3
Ubuntu 16.04 ESM
aws - 86.3
azure - 86.3
gcp - 86.3
generic - 86.3
lowlatency - 86.3
Ubuntu 22.04 LTS
gcp - 86.4
generic - 86.4
gke - 86.4
ibm - 86.4
lowlatency - 86.4
Ubuntu 14.04 ESM
generic - 86.3
lowlatency - 86.3
Support Information
Kernels older than the levels listed below do not receive livepatch
updates. If you are running a kernel version earlier than the one listed
below, please upgrade your kernel as soon as possible.
Ubuntu 20.04 LTS
linux-aws - 5.4.0-1009
linux-aws - 5.4.0-1061
linux-azure - 5.4.0-1010
linux-gcp - 5.4.0-1009
linux-gke - 5.4.0-1033
linux-gkeop - 5.4.0-1009
linux-hwe - 5.15.0-0
linux-ibm - 5.4.0-1009
linux-oem - 5.4.0-26
linux - 5.4.0-26
Ubuntu 18.04 LTS
linux-aws-5.4 - 5.4.0-1069
linux-aws - 4.15.0-1054
linux-azure-4.15 - 4.15.0-1115
linux-azure-5.4 - 5.4.0-1069
linux-gcp-4.15 - 4.15.0-1121
linux-gcp-5.4 - 5.4.0-1069
linux-gke-4.15 - 4.15.0-1076
linux-gke-5.4 - 5.4.0-1009
linux-gkeop-5.4 - 5.4.0-1007
linux-hwe-5.4 - 5.4.0-26
linux-ibm-5.4 - 5.4.0-1009
linux-oem - 4.15.0-1063
linux - 4.15.0-69
Ubuntu 16.04 ESM
linux-aws-hwe - 4.15.0-1126
linux-aws - 4.4.0-1098
linux-aws - 4.4.0-1129
linux-azure - 4.15.0-1063
linux-azure - 4.15.0-1078
linux-azure - 4.15.0-1114
linux-gcp - 4.15.0-1118
linux-hwe - 4.15.0-143
linux-hwe - 4.15.0-69
linux - 4.4.0-168
linux - 4.4.0-211
Ubuntu 22.04 LTS
linux-aws - 5.15.0-1000
linux-azure - 5.15.0-1000
linux-gcp - 5.15.0-1000
linux-gke - 5.15.0-1000
linux-ibm - 5.15.0-1000
linux - 5.15.0-24
linux - 5.15.0-25
Ubuntu 14.04 ESM
linux-lts-xenial - 4.4.0-168
References
- CVE-2021-39713
- CVE-2022-0492
- CVE-2022-1055
- CVE-2022-1116
- CVE-2022-21499
- CVE-2022-29581
- CVE-2022-30594
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