LSN-0094-1: Kernel Live Patch Security Notice

Publication date

18 April 2023

Overview

Several security issues were fixed in the kernel.


Software description

  • aws – Linux kernel for Amazon Web Services (AWS) systems - (>= 4.15.0-1054, >= 4.15.0-1119, >= 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)
  • aws-hwe – Linux kernel for Amazon Web Services (AWS-HWE) systems - (>= 4.15.0-1126)
  • azure – Linux kernel for Microsoft Azure Cloud systems - (>= 5.4.0-1010, >= 5.15.0-1000, >= 4.15.0-1063, >= 4.15.0-1078, >= 4.15.0-1114)
  • azure-4.15 – Linux kernel for Microsoft Azure Cloud systems - (>= 4.15.0-1115)
  • 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, >= 4.15.0-1118)
  • gcp-4.15 – Linux kernel for Google Cloud Platform (GCP) systems - (>= 4.15.0-1121)
  • 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)
  • aws – Linux kernel for Amazon Web Services (AWS) systems - (>= 4.15.0-1054, >= 4.15.0-1119, >= 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)
  • aws-hwe – Linux kernel for Amazon Web Services (AWS-HWE) systems - (>= 4.15.0-1126)
  • azure – Linux kernel for Microsoft Azure Cloud systems - (>= 5.4.0-1010, >= 5.15.0-1000, >= 4.15.0-1063, >= 4.15.0-1078, >= 4.15.0-1114)
  • azure-4.15 – Linux kernel for Microsoft Azure Cloud systems - (>= 4.15.0-1115)
  • 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, >= 4.15.0-1118)
  • gcp-4.15 – Linux kernel for Google Cloud Platform (GCP) systems - (>= 4.15.0-1121)
  • 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-4.15 – Linux hardware enablement (HWE) kernel - (>= 4.15.0-69, >= 4.15.0-143, >= 4.15.0-69)
  • 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-4.15 – Linux kernel for Google Container Engine (GKE) systems - (>= 4.15.0-1076)
  • 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 - (>= 5.15.0-24)
  • lowlatency-4.15 – Linux hardware enablement (HWE) kernel - (>= 4.15.0-69, >= 4.15.0-143, >= 4.15.0-69)
  • lowlatency-5.4 – Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)
  • oem – Linux kernel for OEM systems - (>= 4.15.0-1063)

Details

Lin Ma discovered a race condition in the io_uring subsystem in the Linux
kernel, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).(CVE-2023-0468)

It was discovered that the Traffic-Control Index (TCINDEX) 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-2023-1281)

Lin Ma discovered a race condition in the io_uring subsystem in the Linux
kernel, leading to a null pointer dereference vulnerability. A local
attacker could use this to cause a denial of service (system crash).(CVE-2023-0468)

It was discovered that the Traffic-Control Index (TCINDEX) 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-2023-1281)

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 16.04
aws 94.1 94.1 94.1
aws-5.15 94.1
aws-5.4 94.1
aws-hwe 94.1
azure 94.1 94.1 94.1
azure-4.15 94.1
azure-5.4 94.1
gcp 94.1 94.1 94.1
gcp-4.15 94.1
gcp-5.15 94.1
gcp-5.4 94.1
generic-4.15 94.1 94.1
generic-5.4 94.1 94.1
gke 94.1 94.1
gke-4.15 94.1
gke-5.15 94.1
gke-5.4 94.1
gkeop 94.1
gkeop-5.4 94.1
ibm 94.1 94.1
ibm-5.4 94.1
linux 94.1
lowlatency-4.15 94.1 94.1
lowlatency-5.4 94.1 94.1
oem 94.1

References


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