LSN-0092-1: Kernel Live Patch Security Notice
7 March 2023
Several security issues were fixed in the kernel.
Releases
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, >= 4.4.0-1098, >= 4.4.0-1129)
- 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-4.4 - Linux kernel - (>= 4.4.0-211, >= 4.4.0-168)
- 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 - Linux low latency kernel - (>= 5.15.0-25)
- lowlatency-4.15 - Linux hardware enablement (HWE) kernel - (>= 4.15.0-69, >= 4.15.0-143, >= 4.15.0-69)
- lowlatency-4.4 - Linux kernel - (>= 4.4.0-211, >= 4.4.0-168)
- lowlatency-5.4 - Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)
- oem - Linux kernel for OEM systems - (>= 4.15.0-1063)
Details
Kyle Zeng discovered that the sysctl implementation in the Linux kernel
contained a stack-based buffer overflow. A local attacker could use this to
cause a denial of service (system crash) or execute arbitrary code.(CVE-2022-4378)
Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation
in the Linux kernel contained multiple use-after-free vulnerabilities. A
physically proximate attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.(CVE-2022-42896)
It was discovered that the NFSD implementation in the Linux kernel did not
properly handle some RPC messages, leading to a buffer overflow. A remote
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code.(CVE-2022-43945)
Checking update status
The problem can be corrected in these Livepatch versions:
| Kernel type | 22.04 | 20.04 | 18.04 | 16.04 |
|---|---|---|---|---|
| aws | 92.2 | 92.1 | 92.1 | 92.1 |
| aws-5.15 | — | 92.2 | — | — |
| aws-5.4 | — | — | 92.1 | — |
| aws-hwe | — | — | — | 92.1 |
| azure | 92.1 | 92.1 | — | 92.1 |
| azure-4.15 | — | — | 92.1 | — |
| azure-5.4 | — | — | 92.1 | — |
| gcp | 92.2 | 92.1 | — | 92.1 |
| gcp-4.15 | — | — | 92.1 | — |
| gcp-5.15 | — | 92.2 | — | — |
| gcp-5.4 | — | — | 92.1 | — |
| generic-4.15 | — | — | 92.1 | 92.1 |
| generic-4.4 | — | — | — | 92.1 |
| generic-5.4 | — | 92.1 | 92.1 | — |
| gke | 92.2 | 92.1 | — | — |
| gke-4.15 | — | — | 92.1 | — |
| gke-5.15 | — | 92.2 | — | — |
| gke-5.4 | — | — | 92.1 | — |
| gkeop | — | 92.1 | — | — |
| gkeop-5.4 | — | — | 92.1 | — |
| ibm | 92.1 | 92.1 | — | — |
| ibm-5.4 | — | — | 92.1 | — |
| linux | 92.1 | — | — | — |
| lowlatency | 92.1 | — | — | — |
| lowlatency-4.15 | — | — | 92.1 | 92.1 |
| lowlatency-4.4 | — | — | — | 92.1 |
| lowlatency-5.4 | — | 92.1 | 92.1 | — |
| oem | — | — | 92.1 | — |
To check your kernel type and Livepatch version, enter this command:
canonical-livepatch status