1. Ubuntu Security Notices
  2. LSN-0095-1

LSN-0095-1: Kernel Live Patch Security Notice

Publication date

21 June 2023

Overview

Several security issues were fixed in the kernel.

Releases

Software description

  • aws – Linux kernel for Amazon Web Services (AWS) systems - (>= 5.4.0-1009, >= 5.4.0-1061, >= 5.15.0-1000)
  • aws-5.15 – Linux kernel for Amazon Web Services (AWS) systems - (>= 5.15.0-1000)
  • aws-5.4 – Linux kernel for Amazon Web Services (AWS) systems - (>= 5.4.0-1069)
  • azure – Linux kernel for Microsoft Azure Cloud systems - (>= 5.4.0-1010, >= 5.15.0-1000)
  • azure-5.4 – Linux kernel for Microsoft Azure cloud systems - (>= 5.4.0-1069)
  • gcp – Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.4.0-1009, >= 5.15.0-1000)
  • gcp-5.15 – Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.15.0-1000)
  • gcp-5.4 – Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.4.0-1069)
  • generic-5.4 – Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)
  • gke – Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1033, >= 5.15.0-1000)
  • gke-5.15 – Linux kernel for Google Container Engine (GKE) systems - (>= 5.15.0-1000)
  • gke-5.4 – Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1009)
  • aws – Linux kernel for Amazon Web Services (AWS) systems - (>= 5.4.0-1009, >= 5.4.0-1061, >= 5.15.0-1000)
  • aws-5.15 – Linux kernel for Amazon Web Services (AWS) systems - (>= 5.15.0-1000)
  • aws-5.4 – Linux kernel for Amazon Web Services (AWS) systems - (>= 5.4.0-1069)
  • azure – Linux kernel for Microsoft Azure Cloud systems - (>= 5.4.0-1010, >= 5.15.0-1000)
  • azure-5.4 – Linux kernel for Microsoft Azure cloud systems - (>= 5.4.0-1069)
  • gcp – Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.4.0-1009, >= 5.15.0-1000)
  • gcp-5.15 – Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.15.0-1000)
  • gcp-5.4 – Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.4.0-1069)
  • generic-5.4 – Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)
  • gke – Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1033, >= 5.15.0-1000)
  • gke-5.15 – Linux kernel for Google Container Engine (GKE) systems - (>= 5.15.0-1000)
  • gke-5.4 – Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1009)
  • gkeop – Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1009)
  • gkeop-5.4 – Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1007)
  • ibm – Linux kernel for IBM cloud systems - (>= 5.4.0-1009, >= 5.15.0-1000)
  • ibm-5.4 – Linux kernel for IBM cloud systems - (>= 5.4.0-1009)
  • linux – Linux kernel - (>= 5.15.0-71, >= 5.15.0-24)
  • lowlatency – Linux low latency kernel - (>= 5.15.0-25)
  • lowlatency-5.4 – Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)

Details

It was discovered that the OverlayFS implementation in the Linux kernel did
not properly handle copy up operation in some conditions. A local attacker
could possibly use this to gain elevated privileges.(CVE-2023-0386)

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform data buffer size validation in some
situations. A physically proximate attacker could use this to craft a
malicious USB device that when inserted, could cause a denial of service
(system crash) or possibly expose sensitive information.(CVE-2023-1380)

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.(

It was discovered that the OverlayFS implementation in the Linux kernel did
not properly handle copy up operation in some conditions. A local attacker
could possibly use this to gain elevated privileges.(CVE-2023-0386)

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux
kernel did not properly perform data buffer size validation in some
situations. A physically proximate attacker could use this to craft a
malicious USB device that when inserted, could cause a denial of service
(system crash) or possibly expose sensitive information.(CVE-2023-1380)

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)

Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu
Linux kernel contained a race condition when handling inode locking in some
situations. A local attacker could use this to cause a denial of service
(kernel deadlock).(CVE-2023-2612)

Gwangun Jung discovered that the Quick Fair Queueing scheduler
implementation in the Linux kernel contained 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-2023-31436)

Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in
the netfilter subsystem of the Linux kernel when processing batch requests,
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-2023-32233)

Checking update status

To check your kernel type and Livepatch version, enter this command:

canonical-livepatch status

The problem can be corrected in these Livepatch versions:

Kernel type 22.04 20.04 18.04
aws 95.4 95.4 —
aws-5.15 — 95.4 —
aws-5.4 — — 95.4
azure 95.4 95.4 —
azure-5.4 — — 95.4
gcp 95.4 95.4 —
gcp-5.15 — 95.4 —
gcp-5.4 — — 95.4
generic-5.4 — 95.4 95.4
gke 95.4 95.4 —
gke-5.15 — 95.4 —
gke-5.4 — — 95.4
gkeop — 95.4 —
gkeop-5.4 — — 95.4
ibm 95.4 95.4 —
ibm-5.4 — — 95.4
linux 95.4 — —
lowlatency 95.1 — —
lowlatency-5.4 — 95.4 95.4

References

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