LSN-0095-1: Kernel Live Patch Security Notice
21 June 2023
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)
- 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.(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
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 |
To check your kernel type and Livepatch version, enter this command:
canonical-livepatch status